Learn Digital Photography - Working With Your Camera

Saturday, February 14, 2009

Experiment with exposure Digital cameras usually work best in sunlight, just like film cameras. When you move indoors, or into dim light, things get much trickier -- just like film cameras. So experiment.

One thing you can do is try to shoot your subject from different angles, using a variety of different lighting. If your camera allows you to do so, try turning your flash off. If your camera allows what is called "fill flash," I recommend you try that as well. You will find that every once in a while a flawlessly exposed picture is made even better using fill flash. Also, from time to time turning off the flash and leaving the subject somewhat underexposed can add drama to the shot.

Every once in a while, you'll take the same picture three different ways, with three different exposure options, and get three radically different pictures -- and all of them will look good. But you've got to experiment.

If at all possible, bracket your shots, with one shot slightly underexposed, one slightly overexposed, and one "just right." Some digital cameras will do this automatically, but even then you need to practice. If you are expecting the camera to shoot one frame and it shoots three, there is an excellent chance the last two will look like they were taken by a very surprised photographer.

Special features Most digital cameras have a variety of built-in special features. Some will allow you to record sound, some allow you to take short QuickTime clips, and some allow you to experiment with special effects, such as shooting black and white or sepia-tone images. Until you learn the basics of your camera I recommend that you ignore the special features.

Keep in mind that some of these tricks, such as black and white or sepia-toned images, can be done without the camera. Just load up a normal color image in Photoshop and, in a few minutes, you can have perfect black and white or sepia-toned photos. In other words, if you can do it easily in Photoshop, you might be better off concentrating on taking a good color photo, and worrying about special effects later on at your leisure.

On the other hand, you should try out other special effects. For example, if you pan your camera to track a car moving at high speed, the car will be in sharp focus but the background will be blurred, making an interesting picture. Or you can do the opposite: focus on a particular stationary object -- a child flying a kite, a freshly-painted fire hydrant -- and allow a speeding car to enter the frame. You'll then have a sharply focused center of attention with the added benefit of motion.

Silhouettes are another nice special effect. Try taking a photo with your subject in shadow, eclipsing a brightly-exposed object in the background. The reverse -- a brightly exposed subject against a dark background -- can be just as interesting. Getting a good silhouette with film is expensive: you shoot a lot of frames with little or no reward. With a digital camera, however, the only cost is your time and patience, and your patience will be rewarded.

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Canon Carmera Comparisons

How Many Megapixels Do We Need?

Are you having megapixel envy each time you walk by the camera section of your favorite electronics store? So do I. But, do we really need more and more pixels? The answer depends on what we intend to do with the images.
First, a quick definition of megapixel:


Megapixel is a technical term for "million pixels", where a single pixel is the smallest unit of color that a camera's sensor is able to capture. The more pixels in the sensor, the sharper the image a camera can reproduce. Note that some camera specifications abbreviate megapixel as "MP".



Determine Image Use

Now then, how many of those pixels do we need? The first task in answering this question is to determine how we intend to use the images. We are mainly concerned about uses that require a high resolution digital photo. Putting a photo on the computer's screen requires a low resolution image, so any camera is sufficient, if this is our only intention.
The most common need for high resolution photos is to print or develop pictures. Let us then focus on putting pictures on paper to answer our megapixel question.



Determine Largest Print Size

The second task is to determine the largest print size we would like of our photo. Sure, it would look cool to have poster-size images all over the house of our sweetheart, but are we really going to go through that expense? I assume for most of us, poster size prints fall into the "rarely or never" category.
Having ruled out extreme sizes, we have the three most common photo sizes to consider. According to online photo labs, the following minimum resolutions are sufficient to produce high quality prints:

  • 4 x 6": 640 x 480 pixels (0.3 megapixels)
  • 5 x 7": 1024 x 768 pixels (0.8 megapixels)
  • 8 x 10": 1536 x 1024 pixels (1.6 megapixels)

I know from personal experience that my 3 megapixel camera is as low as I want to go for an 8 x 10" print; any less would start showing pixilation at close examination. Based on this experience, I suggest doubling the above megapixel recommendations when buying a camera.
This exercise has taught us that if we only want 4 x 6" prints, then 0.6 megapixels are sufficient. Most digital cameras start at 2 megapixels, which is sufficient to produce quality prints up to 5 x 7".



Focus On Other Camera Features

Now that we know the minimum megapixel requirements for our needs, we are free to focus on other important features of the camera such as lens quality, color reproduction, optical zoom, body size, etc.

ABOUT THE AUTHOR
Charles Kerekes is an amateur photographer and maintains the Flying Sam Digital Photo Guide (http://FlyingSamPhoto.com) web site to help others find fun and unique digital photo finishing products and services.

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