Showing posts with label digital photography. Show all posts
Showing posts with label digital photography. Show all posts

Friday, July 12, 2013

Prepping Photos for Web Sites and Blogs

I usually shoot for maximum image quality in the camera so that I always have the option to make large prints, project onto a large screen or do major manipulations to the file. This means shooting RAW files with the camera mounted on a tripod and the shutter triggered with a remote or the self-timer. When downloaded to my computer from the memory card these original files are quite large, require adjustments to exposure, saturation and contrast and cannot be recognized by most web software or even many image editing programs.
This original image of otters is 4272x2848 pixels and has had basic exposure, saturation, contrast and color adjustments done in Adobe Camera RAW. It was then converted to a .psd Adobe Photoshop file.
Once photo files are transferred from the camera memory card to my computer, I check them for sharpness and delete any files that are not sharp because of camera movement, subject movement or bad focus. These RAW format files are 4272x2848 pixels out of my DSLR camera and 16-bit.

The sharp files are then adjusted for exposure, contrast and color. These adjustments are all done in Adobe Camera RAW or another RAW file converter. They are saved as .psd Adobe Photoshop files and the original RAW file is retained so that the option of a different "development" in the future is retained.

The .psd file is fine-tuned as needed in Adobe Photoshop, PaintShopPro or a similar editing program. These adjustments are always made on layers to retain the original file intact. If cropping is needed, as is the case with this otter photo, that is done next. After cropping the file size is 2950x1967 pixels. This file is saved with a "cropped" appellation.
This is the cropped, 8-bit, 1000 pixel wide .jpg file called "mg3209-otter-cropped-web" on my photography hard drive.


For general full-column web use I then re-size the longest dimension to 1000 pixels while retaining the same image proportions. This file is changed to 8-bit and saved as a medium quality .jpg file with a "web" appellation added to the end of the file name. I will generally save this web version to the file folder containing images for use on a particular web site or blog.

For a file that was properly exposed in the camera using the correct color balance setting and is not overly contrasty, this entire process from camera memory card to uploaded to a blog takes 5-10 minutes. Some files, of course, require considerably more work(and time).

Food Photography - Because We All Have To Eat

Bananas

I have made my living as a professional chef for more than thirty years but always kept photography separate, concentrating on nature, landscapes and wildlife, architecture, cars, almost anything except food. A few months ago I fully realized this gap in my subject matter and decided to do something about it. This realization came about because I was considering starting another blog about healthy eating.

The new blog would need photos. It did not make sense to me to try to source these photos elsewhere when I could do it myself and get exactly what I needed for each post. So I began a new photographic journey to teach myself food photography.

Following my usual path, I started reading books, doing on-line research, checking out existing food related blogs and studying the illustrating photos in the big food print magazines. My food shots gradually began to improve as I learned from outright mistakes and near misses. I do not yet feel I have developed a real personal style in food photography but am definitely making progress.

Here are a few of the results so far that I am happy with:
Vegetable Saute
Shiitake Mushrooms
Cinnamon Sticks
Roasted Coffee Beans
I will continue on this journey and continue to learn. The healthy food blog(ThinkEatBeHealthy) is now a reality and you can see more of my food photos there.

Thursday, November 4, 2010

All Droid, all day


I spent an entire day with my Motorola Droid as my only camera. Minimizing equipment choices is a good creativity spur for me. Occasionally I will spend a full day with only one lens or with just one compact camera, etc… Trying to keep things fresh.






Sunday, October 31, 2010

Retro Cam app for Android camera/phones


I have been having a great deal of fun lately as well as recharging my creative thinking by shooting with a few photography apps available for free for my Motorola “Droid” camera/phone. I wrote about the FX Camera app in a previous post. This post discusses the Retro Cam app.

Retro Cam simulates several styles of old film cameras. The choices include Barbl(cheap German rangefinder), Little Orange Box(mass produced “toy” camera), Polaroid(with several choices of “look”), Pinhole and Fudge(another “toy” camera look). All camera choices include the ability to select black&white or color output and rectangular or square framing. All also include some degree of “vintage” film effects such as scratches, frame edges, fading, enhanced or reduced saturation, etc… All image files produced are quite small(580x580 pixels for my favorite square framing option) but are quite adequate for on-line sharing and web page illustration purposes.


Except for the very small file sizes produced, I think this is a great app and I am using it more that others I have been exploring. I harbor a deep fondness for vintage cameras and still occasionally use a twin-lens American-made medium-format Cirro Flex from the late 1940’s and a Russian-made medium-format Kiev60 from the 1970’s. Both cameras use square framing. I also love shooting with my Lensbaby Composer on my DSLR, which reminds me of shots from antique large-format view cameras. With the new Android camera/phone apps, I can pick and choose from the various styles at will or just shoot them all in sequence and sort out my favorites later on the computer.


In conclusion, Retro Cam is a fun and easy to use app for mobile Android camera/phones. This app adds variety and interest to photos, effectively camouflages some of the short-comings of the naked built-in camera and produces files that are easily e-mailed or uploaded to an on-line photo album.  Last but not least, it won’t cost you anything to try it out.

Saturday, October 30, 2010

Book review: "Contemporary Landscape Photography"


Contemporary Landscape Photography is a new book by Carl E. Heilman II. It is published by Amphoto Books which has a large stable of photography book titles. Suggested retail prices for the 176-page volume is $24.99 and it is available new through Amazon.comAmazon.com for $16.99.

This is a well written and fully illustrated book covering all aspects of landscape photography. All photographers from beginners to experienced professionals will gain something to add to their photographic arsenal. Starting with a review of equipment choices and features and progressing through development of a personal vision, it then moves on to the possibilities of location and lighting and ends with post-processing techniques. Topic coverage is thorough, in-depth and inspiring.

Heilman includes his personal thought processes and reasoning at many appropriate spots throughout the book, making this much more than just another how-to manual. The illustrating photos are well executed and appropriate for topic. The printing is crisp and clear on heavy coated matte paper stock.

Contemporary Landscape Photography would be a welcome addition to any landscape, nature or wildlife photographer’s bookshelf. We all need a little review of the basics, reminder of more advanced techniques and injection of inspiration now and then. This book is just the ticket.

Friday, October 29, 2010

Florida beach photography

“Florida” and “beach” go together in most people’s minds, whether residents of the sunshine state or visitors on vacation. Even most vacationers to inland destination areas of the state such as Disney in Orlando plan to fit in at least one day on the coast. This post has some tips to help you get the best beach photographs possible.


The bright sand and sun of a Florida beach can cause the same exposure problems as snow. Many camera meters will try to under-expose, leaving the sand looking drab and the water too dark. Use the exposure histogram when available and know how to use exposure compensation and/or manual exposure to get the proper brightness. A polarizing filter can help make swimsuit, umbrella and sky colors pop. Use flash for people pictures to lighten facial shadows.

Remember composition basics. The rule of thirds works for subject placement within the frame. Diagonal, converging and s-shaped lines all work to draw the eye into an image and add a sense of depth. Having a strong foreground subject is another great way to imply depth in a photo. Be careful with lines and objects breaking the frame edges, which can be very distracting.


Try to add some subtle excitement to the shot. Wait until a wave in the background is just starting to break to trip the shutter. Wait for a sea gull or pelican to fly into the frame. Try a slower shutter speed(if possible) to catch the ripple of the wind in a swimsuit, towel or umbrella.

Add interest to shots by using an unusual viewpoint-place the camera at sand/water level(but watch out for waves). Use bright colors as focal points and take advantage of local architecture and vegetation for subjects and backgrounds. Detail shots imply a sense of place and involvement. Don’t be weather shy-stormy beaches can be very dramatic.


Finally, try to protect your camera. There is almost always at least a light breeze at the beach an anything exposed will become coated with salt. Keep the lens cap on the lens whenever the camera is not being used. Try to keep the camera itself out of the wind as much as possible. Be aware of waves when near the water line. Carry a dry cloth and/or blower brush in a pocket or case for cleaning/drying lenses and removing sand.

Sunday, October 24, 2010

Android cat composite

I took a real day off today(at least most of it), did a little recreational reading and spent a few hours playing around with a couple of free photo apps for my Android phone/camera. Since the old black cat was being cooperative, I was able to cycle through almost all of the various options available and get direct, side-by-side comparison shots. This type of experimentation gives me a basis for deciding when and for what subjects I would use any of these variations in "real world" photography. At any rate, the cat and I both had fun and I will now be keeping a sharper eye out for more of these apps.

FX Camera app for Android phone/cameras


FX Camera is a free app available for android mobile phone/cameras. FX makes a variety of different and interesting photo effects available while also down-sizing the file size for easier and faster on-line sharing. I think of it as a third-party upgrade equivalent to the “picture modes” available on most compact digital cameras and DSLR’s.

+Toy Cam mode gives options for color-biased cross-processed simulations, high contrast, vivid single color renditions, warm tone and monochrome. Framing can be set for rectangular or square. Severity of vignettes and pinhole(round) can also be set.

+Polandroid is a Polaroid simulator. The main choices are vintage, faded, aged or monochrome. Rectangular of square framing can be chosen as well.

+Fisheye has only two settings to choose from-round or full-frame.

+Symmetricam splits the frame either vertically or horizontally and creates a mirror-image double.

+Warhol makes four single-color posterizations of the image.

+Normal gives choices of monochrome, sepia, negative or solarize.

I found the Fisheye mode most interesting and quite convincing. Both the circular and full-frame images emphasize and enlarge the central portion of the frame while proportionally distorting the edges. The middle of the image seems to bulge forward while the edges retreat into the background. As with any “real” fisheye lens, much more effective for some subjects than for others and easily overdone.



The Toy Cam is also a mode I will use for some subjects to add interest. I am a fan of vintage cameras and particularly liked the effect produced by the monochrome-medium vignette-square frame settings in combination. The ”look” is similar of some old medium-format film TLR’s I have used.


This app adds a lot of choices for phone/camera images where there were none previously. I would have no problem leaving a Holga or Dianna or CirroFlex TLR at home, saving the film and processing money and carrying just my phone with this app. The image files produced are quite small for prints but adequate for on-line use. And it is really difficult to argue with free.

Saturday, October 23, 2010

Try black and white for emotional and visual impact


When inspiration and creativity seem to be hiding in the bushes it can be difficult to break out of a photographic rut. As the days go by and the images get duller, enthusiasm starts to wane. These are the times when we need to dig deep and do something different to break the patterns of habit. Going so far as to make breaking the pattern a habit can reduce those lackluster photographic spells to a bare minimum.

One of my personal “pattern breakers” is to shoot a day or two of black and white(yes, with digital). The best way to do this with a DSLR is to set the camera to record both RAW and .jpg files set to “black and white” mode. Some older DSLR’s and most compact digital cameras won’t have this feature and it will be necessary to shoot only black and white .jpg files. While not as good for ultimate image quality, .jpg’s serve the habit-breaking purpose of this exercise just fine.

Actually shooting in black and white mode, rather shooting in color and converting after the fact, serves more than one purpose. Obviously the most immediate reason is to get an immediate, on-the-camera-back preview in black and white. The effect of traditional black and white colored filters is visible right away.


A second reason for shooting in black and white mode is to really make the break mentally away from color and into a different thought/vision space. This is very important for creativity and thought stimulation. You will find yourself making images in black and white that just would not work in color. This is one of the points of the exercise.

My favorite tool for making the final image is Adobe Camera Raw when starting from a RAW file. It does a great job and makes it possible to fine tune every color density range. If Camera RAW is not an option, my next choice is color channels. Channels is similar to Camera Raw but with fewer color range adjustments. As with color editing, everyone will eventually develop their own personal favorite “look”.


There are many reasons that black and white photography has never gone completely out of style. When all of the color is taken away, what is left can have much more emotional and visual impact. Color can be used for impact but can also be a great distraction from what the photographer is really trying to communicate. Think of becoming proficient at black and white photography as adding another language to your visual communication portfolio.

Wednesday, October 20, 2010

How low can you go?


Photography, like most art, benefits from brutal and ruthless editing. How much can be cut out in order to focus attention on the main subject? Removing as many possible distraction and detractions as possible from the frame results in a photograph with much more impact.

So, how low can you go? How simple can a photograph be while communicating the photographer’s intent to the viewer? The answer is: much simpler than many photographers think.


There are many routes to simplicity and maximum visual impact. Controlling depth-of-field with lens aperture to eliminate background distractions is common. Bright spots in the background, even if very de-focused, also draw attention and need to be controlled. Colors can be distracting(hence the emotional and graphic impact of black-and-white photography) and can often be controlled by careful choice of viewpoint(remember that monochrome images can be blue-and-white or red-and-white as well as black-and-white). Lines and shapes that break through the edges of the frame can draw attention away from the main subject and lessen impact. Clutter(aka “too much stuff”) within the frame makes it difficult for a viewer to figure out what the main subject of the photograph is supposed to be.

Great photographers use the same editing process for every frame as writers use for every article. Avoid giving too much information at once(keep each frame and each article focused on one subject). Remove all clutter not contributing to the intended idea or emotion (i.e. visual “clutter”, “fluff” adjectives, more than one point of focus, etc…). Always know before tripping the shutter what the main subject of that frame is.


Tripods are a great editing tool for photographers. Using a tripod slows down the process of making a photo. More attention can be paid to the edges of the frame, to the background and to the content of the frame. Depth-of-field can be checked. Point of view can be minutely adjusted for the most impact and fewest distractions.

Make a habit of using these techniques and more “ooh’s” and “ah’s” will come your way. Photos containing just enough information to get the intended across to the viewer have much greater visual and emotional impact than photos containing too much information(remember the old Police song?). These ideas are what is really behind the old maxim “if you want better photographs, get closer”.

Tuesday, October 19, 2010

Imgur for Android makes photo hosting easy

The following article is a guest post by smart-phone expert Craig Walkup.
 

An aspect that I have always felt has been lacking in the mobile world is the ability to upload photos to photo hosting sites easily and seamlessly. Now one of the best options I have seen for this comes to the Android Market in the form of Imgur for Android.


First things first, if you have never heard of Imgur, you need to know that it is one of the best and simplest photo hosting sites on the internet. Where most hosting sites have all kinds of limitations, from forcing you to create an account, to limiting what you can do with photos after you upload them, Imgur has none of that. You can literally go to their site, hit upload, pick your file, and watch as your photo is quickly uploaded, then presented to you with links for HTML codes, message board codes, and even direct image links. You also have the option of creating an account if you want to, which will simply hold on to all your uploaded photos in a simple page so you can go there and find them easily by thumbnail. I had been using Imgur for a while, and was elated to find out that someone had made a real app for the Android operating system.


This app is as easy as the website to use. Upon opening the app, you will be taken directly to the pictures you have already uploaded in your account, along with buttons at the top to refresh the album, a camera button to open the camera, and an upload button to upload a picture from your phone. If you don't have an Imgur account, the screen won't have any pictures on it. I suggest opening an account, as it keeps track of everything you've uploaded, and you can completely manage the files from the app or from the website.
When you click to upload a photo, it will being you to your gallery screen, where you choose what photo to upload, then it will ask you if you want to upload it under your account or anonymously. Another neat thing about the app is that it integrates itself in to the operating system, so when you take a picture and click the share button, imgur comes up as an option along with text, email, facebook, twitter, etc. This is an excellent app for any Android user wishing to use photos between their mobile device and the internet.


Imgur for Android is available in the Android Market as a free app. Make sure if you search for it, you download the one called "Imgur for Android"
developed by Colin Edwards. The other ones that come up are poor applications. There is a download version for this app if you feel like supporting the developer, it is $1.99 but doesn't seem to include any added functionality, except preference in future feature requests.


Imgur: http://imgur.com/


Imgur for Android:
http://www.appbrain.com/app/imgur-for-android/com.imgurforandroid


Craig is a contributor for iPhone repair techs at iFixyouri.

Friday, October 15, 2010

The Lensbaby


The Lensbaby company makes a very interesting line of lenses. The latest and greatest incarnations have interchangeable optics and a variety of accessories available. Three current models are all variations of the very first: a tilting lens for SLR/DSLR cameras with basic, old fashioned optics. The images produced by a Lensbaby are sharp in the center with progressively more softness, optical distortion and color aberrations towards the frame edges.

The size of the central “sweet spot” is controlled by the aperture. Lensbaby apertures are physical disks inserted into the front of the lens using a supplied tool. No disk in place corresponds to approximately f/2 and full-stop disks are supplied up to f/22. At f/22 nearly the entire frame looks reasonably sharp.

The placement of the “sweet spot” is controlled by the tilt of the lens. When the lens is straight the sharp area is centered in the frame. When the lens is tilted to the right, the sharp area moves to the right.

The “Composer” model I currently own has a ball-and-socket arrangement to control the tilt and is very easy and intuitive in use. There is a locking ring to hold the lens in position for repeatability. I have also used the older “IIIG” model, very similar to the latest “Control Freak”. The IIIG/Control Freak is like a view-camera bellows-and-lens on an SLR. It is more complicated to use than the Composer but also slightly more versatile.



There are as many reasons to use a Lensbaby as there are photographers. One I know uses his “Muse”, the base-model Lensbaby, as a substitute for a toy camera like a Diana or Holga for street shooting. I have seen excellent portrait and wedding work with Lensbabies from nationally known professional photographers. I love my Lensbabies because they are fun and they produce images that can’t be made using modern lenses or editing software.

When I mount a Lensbaby on my DSLR, I am suddenly using a 100-year-old folding-bed view camera with a hand-ground, uncoated doublet lens. I almost always shoot a Lensbaby at f/4 or f/5.6 to get a distinctive and distorted softness around the edges. Contrast is quite low and highlights are smeared into the shadow areas. I usually shoot in aperture-priority automatic exposure mode and often dial in -1/2 to -1 stops of exposure compensation to tame the highlights.


Occasionally I will want only the tilt function for focusing reasons. Using the f/16 or f/22 apertures nearly eliminates the edge softness and distortion. While certainly not the quality equivalent of a Canon or Nikon tilt/shift lens, a stopped-down Lensbaby can produce surprisingly sharp images. I also use my models on extension tubes for macro work and with a tele-converter for more reach, both with good results.

Available accessories include tele, wide and ultra wide adapter lenses that screw into the front filter threads. Internal optics choices consist of double-glass(sharpest), single-glass, plastic, soft-focus and fish-eye. These accessories provide a lot of versatility and choices of “look” for the final image. This is why Lensbabies have become so popular and lasted so long in a tough photography market.

Wednesday, October 13, 2010

Transmitted light photography

One of the best ways to achieve great color saturation, show internal structure and get a distinctive look in a photograph is to take advantage of transmitted light. This is light that passes through a translucent subject rather than light reflected from the object. This is accomplished by using back-lighting: the light source is behind the subject. Framing tightly to exclude edges eliminates the flare, diffraction and over-exposed background seen in most back-lit photos. Think of shooting stained glass on a sunny day from inside a dark building as opposed to the same stained glass shot at night using flash. The colors have a rich glow and depth not seen in a reflected-light image of the same subject.



An added bonus, especially for nature photographers, is the visibility of the internal structure of the subject. All of the veins of a leaf and the varying thickness of flower petals become apparent when the image is made with light passing through the subject. The result can be very interesting photographs indeed. Even quite ordinary subjects such as the pages of a book can become more interesting by using this technique.

Green leaves, brightly colored autumn leaves, glass panes and bottles, paper and clothing can all be photographed with transmitted light to bring out internal structure and rich colors. Any subject that is at least slightly translucent and large enough to fill the frame is fair game. The less translucent the subject, the brighter the back-lighting must be(or the dimmer the ambient light) to overpower the light reflected from the side facing the camera. This technique should be part of every creative photographer’s arsenal.


Finding subjects is easy. Look towards the light source. During mid-day, this might mean getting low to the ground and looking up. At dawn or dusk the solution is to look towards the rising or setting sun. Indoors, try placing the subject between the camera and the light source or placing the flash behind the subject facing toward the camera.

Exposure is a straight forward affair. If the subject fills the frame any automatic setting should give a correct exposure. If the subject occupies a smaller are of the frame, exposure compensation might be needed to correctly expose the subject while allowing the background to be over-exposed(as in more traditional back-lighting). Experiment with exposure whenever possible to get the most pleasing results.

Monday, October 11, 2010

Creative Zooming

Zoom lenses are popular with most photographers because of the added versatility they offer compared to fixed-focal-length(prime) lenses. A zoom lens allows the photographer to choose the point of view and then vary the perspective/background by changing the focal length and distance to the subject with a single lens. Zooms also let photographers change the subject size in the image and/or the framing without physically moving to get closer or farther away from the subject.

In addition to the conventional selling points, zoom lenses offer important creative possibilities not available when using prime lenses. One creative use of zooms is to change the focal length during a long exposure. The result is a subject centered in the frame appears to be exploding or imploding depending which direction the focal length changes. This technique has endless possible variations all starting from the same point.


A slow shutter speed is required, preferable at least ½ second or longer. Enough time is needed to smoothly change focal lengths during the exposure. If a sharper main subject is desired, part of the exposure should be at a constant focal length and only part of the exposure zoomed. Another way to get a sharper main subject is to use flash. The long shutter speeds required can be achieved by combinations of: low ISO speeds, small f-stops(f/16-f/22) and use of polarizing and/or neutral-density filters.

This technique is best accomplished with the camera locked down on a solid tripod. Hand-holding will produce much less predictable but possibly more interesting results. Unlike the usual compositional advice, zooming during exposure normally looks best with the main subject centered in the frame(that is where the explosion/implosion lines converge).

Every photographer should experiment with all of the variables to find the results they prefer. Once that result is achieved this is a very repeatable technique. Always try variations for different subject matter. If using flash, try both first-curtain and second-curtain synch to see the difference and decide which is preferred. Try zooming both short-to-long and long-to-short-the results will not be the same.


Another variation of this technique is to shoot many exposures at slightly different focal lengths and combining all exposures into one image(this could be done on one frame of film). The result will be a “stepped” zoom look without the streaks of a continuous zoom. This is also best done with the camera on a tripod to keep framing and focus constant.

Saturday, October 9, 2010

New Techniques to keep creativity alive


Keeping photography “fresh” is all about maintaining an open mind to new techniques. This often means applying already-used techniques in new ways or new situation or to new subject matter. A willingness to experiment this way is the key to maintaining creativity. No one has difficulty falling into a rut. Getting out of that rut requires some effort.

The hardest part for me is taking the time and effort to try something new. For me, creativity requires periodically and consciously coming to a complete halt and taking the time to think and speculate about new possibilities. There has to be a willingness to suspend judgments about the possible outcomes. The time must be taken to execute the new ideas and process the results.

This is the way the standard catalog of photography techniques is expanded. It is how the accepted range of subject matter is enlarged. Occasionally setting time aside for experimentation and to just play around with new ideas is what keeps creativity alive.

The photo illustrating this article is a good example. I went to the local park as usual with the intention of getting my morning walk and perhaps some wildlife or nature photos. For the past few days I have been thinking of changing my profile photo on FaceBook. While on a boardwalk through a forested area, quite dim under the foliage and just after sunrise, I decided to take a few minutes to experiment. For my usual nature shots in these conditions I would use a DSLR at ISO800 on a tripod without flash. I took out my compact Canon G10, set ISO200 and f/5.6 with built-in flash “on”. This gave a meter-recommended shutter speed of ¼ second. Holding the camera at arm’s length, I took a dozen shots while spinning slowly in place. The result was three “usable” photos and a new technique that I will continue to use in a variety of situations and subjects.

I have used camera motion during long exposures before, primarily for panning moving subjects but also to render more dream-like and abstract images of trees. Flash combined with slow shutter is also not a new technique but previously I always had the camera locked down on a tripod combined with second-curtain sync. The result is some new creative excitement and thoughts about how to apply this technique to other situations and subjects.

Wednesday, October 6, 2010

Blurring the lines between types of photo products


This is a time of rapid innovation for photography. A previous post discussed the various types of digital cameras currently available. This post is about new image-making gadgets that are blurring the lines between camera types. Expect much more of this sort of innovation as the general public becomes more accepting of cameras that just don’t look like traditional cameras.

Panasonic has been making the Lumix line of digital cameras for many years. These cameras have been well received by both the general public and by photographers because of their good design, high quality construction and image quality. Panasonic has now introduced a new Lumix camera that is also a mobile phone, so far only for sale in Japan. The camera-back LCD functions for both camera and phone and slides to reveal a dialing/texting keypad. There is a 13 megapixel sensor behind a lens that starts at 27mm-equivalent. It is a pretty basic camera but still far ahead of any other camera/phone. Expect something similar, from someone, in the U.S. before too long.

Also from Panasonic is a 3-D lens to mount on micro-four-thirds camera bodies. There are the usual two lenses, no zoom and apparently no aperture control or low-light ability. Having only seen photos at this point, it looks quite thin and light, certainly smaller than the average micro-four-thirds “kit” zoom lens. For a few hundred dollars this would be a good way to try out 3-D without buying a dedicated camera. Assuming there was already a micro-four-thirds camera body in the bag, of course. To a large extent the future of 3-D will depend upon people willing to replace not-outdated flat-screen televisions with new, smaller, more expensive 3-D televisions that require glasses. This could be a tough sell.

Sony is also innovating and blurring product lines. The new Sony NEX-VG10 is a combination video/still camera accepting interchangeable lenses in the Sony E-mount. A-mount Sony and Minolta lenses can also be used with an adapter. The NEX-VG10 has the form-factor of a traditional video camera, the size of a very small DSLR and a very good top-mounted stereo microphone. The sensor is an APS CMOS capable or recording 14 megapixel still images at 7 frames per second and 1920x1080i HD video at 60 frames per second. Image stabilization is supplied by the lenses. The NEX-VG10 seems to pack in nearly all of the best features of Sony’s DSLR’s in a form more suited to video capture, including a side-mounted 3” LCD. Memory is the Sony-standard memory stick or SD/SDHC.

As the number of photographers who grew up using film cameras declines, acceptance of new camera shapes and combinations of functions will grow. A digital image sensor is much easier to work around than a roll of 35mm film. Video has become a popular feature on DSLR’s recently but is inconvenient to use with that camera shape. Cell phones that can surf the internet and cameras that can send photos or video directly to YouTube or Flickr are popular, so combining a phone with a high quality camera seems an obvious choice.

Sunday, October 3, 2010

The types of digital cameras


The most basic digital cameras are those built into cell phone. Many do not even think about their phone being a camera, but some of the newer phones actually produce quite good image quality at five mega-pixels or more. The biggest problem with phone-cameras from a photography standpoint is the total lack of control. ISO speed, color balance, lens aperture and shutter speed settings, file format of the image file and amount of compression used on the image file are all handled by the phone with no input from the photographer. For quick record shots to immediately send to a friend by e-mail or to post to Facebook or Flickr, they are adequate and obviously much better than nothing. For more serious photography they can also produce quite good images as long as their limits are known and worked within.

Next up the image-quality scale are the compact digital cameras. This type of camera has a built-in lens, often a zoom, a small image sensor with correspondingly tiny individual pixels and often lacks an optical viewfinder. Compact cameras cover a very wide range, from barely above cell-phone functional to nearly DSLR quality. The huge majority are in the middle of this range. They offer zoom lenses in the 3x to 6x range, some exposure control(compensation and/or aperture priority but often not full manual settings), often a choice of ISO speeds and usually include some sort of anti-shake mechanism. The best of the compacts also offer a hot shoe for more powerful flash, near DSLR-like control of settings and the choice of saving image files in RAW format for better image quality.

Compact cameras should produce image quality more than adequate for any on-line use and print publication at up to full page sizes. Careful attention to shooting techniques minimizing noise/grain and maximizing sharpness/detail will really pay quality dividends with these cameras. Images taken with my personal compact camera are used regularly to illustrate my on-line real estate column and web sites.

A new type of camera occupies the next rung of the ladder. A real name has not yet been decided but they are being called “compact interchangeable lens”, “micro four-thirds” or “electronic viewfinder interchangeable lens” cameras. They use a sensor much larger than most compacts but about half the size of most DSLR’s. Lacking optical viewfinders, they rely on built-in or accessory electronic viewfinders or just on the camera-back LCD. Because there is no prism or reflex-mirror housing and a smaller sensor, these camera bodies can be made nearly as small as a compact camera with small, light-weight lenses to match. Because the sensors are much larger than those in compact cameras image quality can come close to matching that from DSLR’s. My feeling is this class of camera will really catch on with the public.

DSLR’s are the traditional 35mm film camera in digital form. Sensor sizes range from APS-C to full-frame 35mm, giving large individual pixels for optimum image quality even at higher ISO values. Bright, sharp optical viewfinders occupy the top of the cameras, with some also offering “live view” on the camera-back LCD(emulating compact cameras). All of the functions offered on traditional 35mm film cameras plus many more are available on almost every model. The result is a comparatively large and heavy camera body and accompanying lenses. In practical use, this type of camera is still the most versatile, offers the greatest choice of lenses, flashes and other accessories, and produces adequate image quality for up to 16”x20” prints or even larger.

The final type of digital camera is the “medium” format. Again, these are digital versions of the former film cameras. They are generally considered professional-only because of the high price of the bodies and lenses. Much larger and heavier than DSLR’s, usually only those needing extremely large prints or the ultimate of image quality even consider them.

My personal choice is a combination of camera types. I have a cell phone with a 5MP camera which works fine for a quick snap of a restaurant dish for an on-line review, to record dings/scratches on a rental car or to remember a house for sale. I use a compact camera for on-line illustration shots and whenever a DSLR is too conspicuous or just in the way. My DSLR is still the workhorse because of its versatility and image quality. But I always have at least one of them with me and I will use whatever camera is handy to make the best shot possible.

Thursday, September 30, 2010

Compact digital cameras


*Why own a compact digital camera?
Even though I have taken the route of simplifying my DSLR outfit to the bare minimum I still own a compact digital camera as well. There are several reasons for this. The most important reason is for an emergency back-up in case the DSLR goes down. Another is there are times and places it is just not as practical to carry the larger camera, even if only the body and one lens. There is also a down-side to using a compact compared to a DSLR.

*Size, weight, carrying ease and visibility
Sometimes it is just much easier to carry only a compact camera. It might be a windy day on the beach with blowing sand and salt spray or it might be storming with blowing rain or snow. A compact camera can be carried in a pocket and is ready to shoot when pulled out and be quickly protected again. A DSLR is either exposed on a neck strap or in a much less accessible case. Replacement cost in case of damage from the elements is a factor, too. In some areas it might be much wiser not to make a show of carrying camera gear, even if just cheaper “amateur equipment, and becoming a possible target of thieves or hostility. Carrying just a compact camera is less conspicuous. It can be taken from a pocket and a photo taken without bringing it up to eye level and quickly removed from sight again. For “street” photography a compact can be carried hidden in one hand and frames exposed on the fly. A compact is also much quieter than a DSLR so observers don’t know when or if exposures are being made. It can be very liberating to wander around looking for images without a larger and heavier DSLR outfit hanging from the neck or attached to a tripod.

*Image quality
Image quality from compact digital cameras is not the equal of DSLR’s but steps can be taken to maximize that quality. The smaller cameras mostly suffer from a smaller sensor which means smaller individual pixels. Image quality suffers much more as ISO speeds increase than it does with larger sensors. As with a DSLR, always shoot at the lowest practical ISO to get the best image quality. Zoom lenses with very wide focal length ranges tend to suffer much more from linear distortion and aberrations at both the shortest and longest ends of the zoom range. Longer range zooms on compacts are always much slower, too, limiting the usefulness of the longer focal lengths unless a tripod is used.

*Desirable features
When selecting a compact camera I look for a good image stabilization/anti-shake function as a tripod or monopod will not usually be used. Either easily accessible manual exposure or exposure compensation is a must to correct for backlighting or other exposure difficulties. I prefer a zoom in the 4x to 6x range to minimize both image quality fall-off at the focal extremes and speed loss at the long end of the range. I much prefer a zoom range starting at 28mm equivalent or shorter for versatility. It is usually much easier to move closer to a subject than to try to back up through a wall to fit more into the frame. The ability to shoot RAW files is a huge plus but not an absolute deal-breaker. Fitting into a pocket rather than requiring a neck strap or case is high on my list and another reason for choosing a medium-range over a longer-range zoom. A hot-shoe for accessory flash when needed is another plus but also not a deal-breaker.

*What to expect
A good compact digital camera, which includes most of the models currently available, should provide more than adequate image quality for on-screen and web use and for prints up to 8”x10”. Most will start having image-quality issues at larger sizes including softness and noise(grain) as compared to similar shots from a DSLR with a larger sensor. Color and noise problems can be more obvious if RAW shooting is not possible. Using the quality-enhancing techniques outlined in the “Most basic equipment” series will minimize these problems when using compact cameras, too. Just don’t expect to use a compact at maximum focal length and ISO800 for 16”x20” prints for the dining room wall – you will be very disappointed with the results. For images to post on a web site or Flickr or to e-mail to friends or to make 4”x6” prints to show, no one will know what kind of camera was used.

Monday, September 27, 2010

Using the most basic camera equipment-Part 4


This is the fourth and final installment of this series exploring photography using only the most basic of “modern” digital camera gear: one “beginner’s” camera body and two “kit” zoom lenses. I will talk about techniques to optimize the image quality from any camera/lens combination and how these techniques minimize image quality differences between “basic” and “top-of-the-line” equipment.  Part 1 covered my reasons for doing this prolonged experiment. In Part 2 I talked about why I enjoyed using the minimal “amateur” kit. Part 3 discussed the things I missed most about not having a complete “professional quality” camera system.

We will start out by taking a look at some of the differences between “entry-level” and “professional” camera bodies and lenses. There are plenty of differences but not necessarily the ones beginning photographers assume. This will tie the reasons why “basic” equipment is often perceived to produce inferior image quality to more expensive gear.

The most noticeable differences between the two levels of gear are size and weight. The two are tied together and the reason “better” gear is both larger and heavier is build quality. “Professional” cameras and lenses are designed for heavy, every-day use in tough conditions and for continual rough treatment during frequent travel. The bodies and lenses are built inside a metal skeleton, usually with shock-absorbing materials between the skeleton and internal mechanical/electrical components and often with more shock-absorbing material between the skeleton and external shell. Heavily stressed components such as the mechanical shutter and controls in a body or the focus and zoom mechanisms in a lens  are much tougher and longer-lasting than those used in “starter” gear. “Professional” camera bodies have larger memory buffers and faster processing software to allow faster frames-per-second burst rates for more frames than “amateur” bodies. The high-end bodies include a lot more “bells & whistles” features and lenses will have internal focusing and constant apertures throughout the zoom range. “Professional” lenses will often feature elements of special-formulation glass and/or aspherical elements to further minimize optical and color distortions. Some of these differences have a slight impact on final image quality but most do not affect image quality at all.

Another difference between the two levels of gear is price. The “professional” equipment can easily cost five to ten times as much as the “entry-level” gear. This price difference pays for all of the upgraded features listed in the previous paragraph. I expect “professional” gear to last for many years of hard use, taking hard knocks in extreme weather conditions and being constantly vibrated by car and plane travel. It is always a pleasant surprise when an “amateur” body lasts me more than a year or two. This is one of the areas that cheaper gear has really improved in recent years. My Canon digital Rebel XSi and “kit” zooms are nearly two years old and going strong.

The “real” differences of final image quality between “professional” and “amateur” camera equipment are caused by the way the gear is used. There are many techniques used by professional photographers wanting maximum image quality in each and every frame that most casual and beginning photographers don’t know about, don’t think about or just think are too much trouble to deal with. Professional and top amateur photographers do use these techniques, every frame, and that makes the real difference in final image quality.

Maximizing image quality with any camera:
First and most important is to use a tripod with image-stabilization turned off whenever possible. A tripod is much superior to any image stabilizing technology built into a camera body or lens. I f it is not possible to use a tripod, use a monopod with image-stabilization on instead. A tripod will deliver maximum sharpness every frame by eliminating camera shake during exposure. Additional benefits are the ability to use lower ISO’s for minimum digital “noise” as well as better color and dynamic range. A tripod mounted camera promotes more care with framing, composition and focus. The ability to use longer shutter speeds also allows the use of smaller lens’ apertures to maximize sharpness and/or depth of field(most lenses are not at their sharpest at maximum aperture). Using a self-timer or remote shutter release and avoiding shutter speeds between ¼- and 1/60- seconds will reduce camera vibration during exposures even more.

Color accuracy and fine details can often be further enhanced by using a polarizing filter. A polarizer can reduce or eliminate color cast reflections which mask true subject colors and mask fine detail. Using a lens shade designed for a particular lens also helps in these two areas by minimizing internal lens reflections that reduce image contrast and detail.

Get the best exposure each shot to maximize the amount of data in every image. More data means greater ability to adjust the image in editing software without degradation. Digital camera sensors produce more depth of data at higher exposure levels than in the shadow areas of the image. Keep the exposure histograms turned on and pay attention to them. Do a test to see how much a scene can be over-exposed on the camera histogram and still have retrievable detail in the highlights. Give as much exposure as possible to every frame for maximum data and then adjust as needed in editing software.