Digital Camera Buying Guide - Choosing

Paying attention to megapixels is only important now if you intend to make truly large prints. Resolution determines the maximum print size which can be made from a single image without degrading image quality. All modern digital cameras have at least 12 megapixels which is more than enough for a 12" x 18" print.

It is critical to get enough megapixels for a desired print size. Otherwise, printed images will appear unsharp. Getting significantly more megapixels than needed may degrade image quality though due to increased image-noise. Unfortunately, consumers are rarely given the opportunity to choose fewer megapixels.

For uses other than print, so few megapixels are needed that there is little point checking if a new camera has enough megapixels. It always does. Even the highest-resolution HDTV never requires more than 2 megapixels. The highest resolution computer monitor currentlyIBM used to have one with 9 megapixels (T221) but it has been discontinued. in production has 4 megapixels.

Since displays and printers produce pictures using tiny dots, giving them more pixels than they use is futile. In other words, the extra pixels are ignored! Look at the following table to see how many megapixels are needed.

Different subjects require different things from a digital camera. All digital cameras manage well with daylight-lit outdoor pictures.

	Taking indoor pictures under typical household lighting demands the use of a flash or high ISO sensitivity. Most photographers use flash because high ISO sensitivities make pictures look noisyEven with traditional 35 mm films, high ISO means larger, more visible grain unless an expensive DSLR is purchased. High ISO sensitivities are preferable to preserve the mood of lightingUnless using a tripod for photographing still subjects..
	A built-in flash must reach far enough to light a subject completely, otherwise an external flash will be required. In such case you must get a camera with a hot-shoeOr a sync-port for studio-flashes. to connect the external flash.
	Night photography requires slow shutter speeds. Preferably longer than 4 seconds. Control over shutter speed is critical, otherwise it is quite difficult to obtain desired results.
	Sharply photographing moving subjects requires fast speed shutters. For people doing sports you need at least 1/500. For faster subjects such as race cars, horses and speedboats look for a camera with 1/2000 or faster shutter speeds. To ensure a fast shutter speed is obtained a camera must have a shutter priority mode or a fast-shutter subject programSometimes called sport or action mode.. Indoor sports require a camera with high ISO sensitivity which is most likely a DSLR.
	Wildlife photography requires the use of long zoom lenses because most animals don't easily let people get close to them. Even insect photography is better with a long zoom because of their small size. If you intend to photograph wild life either get an Ultra-Zoom camera (10X or more) or a DSLR with a long zoom lens (300mm or longer).
	A continuous drive mode is frequently used to get good pictures of moving subjects. Cameras that have a continuous drive mode take pictures in rapid succession. The number of frames- per-second (FPS) is the number of pictures taken in one second. The burst length is the number of pictures that can be taken consecutively at the maximum frame-rateBefore the camera stops taking pictures or slows down dramatically..
	Special situations like fireworks, moving light-trails and artistic photography absolutely require having manual controls.

To take a picture of a subject, you must have your camera near it. To get it there, you must transport it. This is why it is extremely important to get a camera of the right size. Unfortunately not all features are available in every camera sizeManual controls are rarely found on small cameras, for example.. Picture quality is better with a bigger lens, which means a bigger camera.

Camera sizes fall into 6 categories:

• Ultra-Compact: Fit in most pockets and are easy to transport unnoticeably anywhere.
• Compact: Easy to transport, fit in purses and waist-pouches.
• Medium: Too big for the average purse, these can be kept in an average camera bag.
• Large: Definitely too big for a purse, fits in a nap sack or large camera bag.
• SLD: Interchangeable lens cameras which can be Medium size when paired with a slim lens, usually larger.
• SLR: Large enough to need a large camera bag, they are easy to notice and can feel heavy to carry.

Other location considerations:

• Underwater photography requires a waterproof camera or an underwater camera case.
• A few cameras are splash-proof for taking pictures in the rain or in dusty environments.

Some cameras are better than others even if they are the same size and have similar features. Here are the types of quality to look for:

• Picture quality: Good cameras produce pictures with less noise or other problems such as distortion, chromatic aberrations, blurring, color shift, etc.
• Ergonomics: There are digital cameras that are easy to use and some that are not.
• Build quality: Some cameras are more sturdy than others and will last longer.
• Performance: The speed at which a camera focuses, takes pictures and updates its LCD all affect its usability.

When looking at camera models in the next step look for these icons which indicate quality: