Friday, November 16, 2007

Wondering how to use your digital camera? Wonder no more

It is important to realise that there is no such thing as a perfect camera, one that will be the best for everyone. Although we sometimes talk about 'cameras of the year' or 'top picks', such lists and awards are really of little consequence. The camera that wins most accolades may not be the one that is most suitable for you. The important thing you need to do is to think about what you want from a camera; you need to know what the various specifications mean, and to work out which is the best for you. Even those aspects that can easily be quantified - such as the number of pixels the sensor records - are not always straightforward. For some people a 2 megapixel (Mp) camera may be a better choice than a 4 Mp model. Even where image quality is important, you cannot assume that a 5 Mp camera will necessarily give better results than a 3 Mp model. As in life, other things are seldom equal.

During photography's entire history, the amateur and the professional have represented distinct and often contrary approaches to photography, each battling for supremacy. Has the digital revolution tilted the field of battle irrevocably in the amateur's favour? Or has it swept this traditional rivalry into the dustbin? Can anyone say? For the 19th-century practitioner, photography was fraught with personal and technical adversity. The darkroom environment was equally challenging: space was constrained, and in smaller field tents the photographer had to kneel or lie down to work. Ventilation was poor or non-existent, and lightproofing faulty. Digital photography is starting to become accessible to the average consumer. Camera prices are falling and image quality is improving. Compared to conventional 35-mm photography, there is no film or processing costs, and results are immediately viewable so a re-shoot can be made quickly if needed. Plus there are more and more applications where digital images are more convenient and cost effective.

It is usually taken for granted that white is white, with no variations. However, all artists would agree that this is wrong, including photographers. The white balance of a camera can make or break a picture, meaning you must learn to control it. In order to regulate it, you must set your camera to manual or custom white balance, and take a picture of something white. It must fill the screen, and should not be in shadows. If the result is not to your preference, you can always use your photo program to tweak the picture.

Action photographs are quite popular, though they are difficult to take properly. Speed is essential to taking clear pictures for indoor sports and activities. The shutter speed is crucial, for if it is too slow you will lose the picture, as the movement will have continued past the shot you wanted. The results can be erratic, so the highest quality won't be assured. Make sure when taking pictures of indoor sports that your camera is on a setting with a fast shutter, such as rapid fire mode.

JPEG (pronounced "jay-peg") is a standardized image compression mechanism. JPEG stands for Joint Photographic Experts Group, the original name of the committee that wrote the standard. JPEG is designed for compressing either full-color or gray-scale images of natural, real-world scenes. It works well on photographs, naturalistic artwork, and similar material; not so well on lettering, simple cartoons, or line drawings. JPEG is "lossy," meaning that the decompressed image isn't quite the same as the one you started with. (There are lossless image compression algorithms, but JPEG achieves much greater compression than is possible with lossless methods.) Making image files smaller is a win for transmitting files across networks and for archiving libraries of images. The real disadvantage of lossy compression is that if you repeatedly compress and decompress an image, you lose a little more quality each time. This is a serious objection for some applications but matters not at all for many others.

If you use a flash in a dark environment, you often get a red eye effect. This is because the light of the flash is reflecting from the retina, which is covered with tiny blood vessels. The more open the pupils are, the more red eye effect you get in your photos. Red eye is more pronounced in people with light eye color. It is also more pronounced in people with blond or light-red hair and in children. Many cameras have a built-in red-eye reduction pre-flash that helps reduce the incidence of red eye. Red-eye reduction works by having the flash shine a light into the eyes of the subject prior to taking the picture. This causes the pupil to contract. However, you have to make sure the subject is looking at the camera. If not, this technique won't work. Also be wary of using red-eye reduction feature when not necessary, because it may cause your subject to blink.

How do you begin to take good photos? The first thing to remember is this: It's the photographer that takes great photos, not the camera. Think about that for a minute. It's true isn't it? I've seen some people take great photos with a simple point-and-shoot camera, while some take lousy shots with the most expensive SLR. Always look for beautiful natural light. The best natural light usually occurs right before, after, and during sunrise and sunset. Be deliberate and creative. Think about what would make a good background, what would make for good colors. When you set out on a picture-taking spree, shoot 10 to 25 pictures so that you can be sure of getting a good shot. Vary the distance, setting, poses, or even the times of day.



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