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GENERAL FAQs
1. What does MegaPixel mean?
A pixel is a little square that makes up the image on your computer screen. A digital camera's CCD can only capture so many of these pixels, which are then stored in memory, and later transferred to your computer. The word "mega" is taken from the Greek word meaning "great", and usually means "one million." Hence, a camera with 1,000,000 pixels is a 1 Megapixel camera.

2. What exactly is resolution? How does it work?
Resolution refers to the number of pixels or dots per inch (dpi) in an image. Basically, the more dpi that a photo has, the sharper an image is. High resolution is important if you are going to be printing photos (look for a photo-capable printer that has a high resolution, say 4800 x 1200 dpi). If you'll be e-mailing your images, you may want to save your photos at a lower resolution for faster file downloads.
Digital camera resolution is measured in megapixels (1MP equals one million pixels), so the higher the MP capacity a camera has, the higher quality of images it will produce. Generally you can take good photographs with a 3MP camera.

3. What's the difference between optical zoom and digital zoom?
It's important to understand this difference, as you could end up mighty disappointed with the results if you get one rather than the other. Optical zoom is similar to what you'll find in a regular 35mm camera: When you push the button to zoom in or out, physical lens elements move inside the camera, to achieve the desired effect. Digital zoom, on the other hand, has no moving parts. Using the "electronic brain" within the camera instead, the camera takes a look at what its "looking at", and digitally zooms in, usually two or three times closer.
The problem with digital zoom is that you lose quality when you do this -- your images will tend to be more "pixelated" than the same image taken with an optical zoom camera. This is due to the "interpolation" the camera use, which is a nice way of saying that it makes a guess about how the picture should look while zoomed in. Having optical AND digital zoom on a camera isn't bad, but I'd try to avoid cameras with only digital zoom, myself.

4. In what format should I save my digital photos in order to store them?
The building blocks of your image library are the actual file formats in which you save your images. There are two major formats: compressed and uncompressed.
· The advantage of uncompressed storage is that you can save a maximum amount of image-forming information for color fidelity and clarity. · Compressed file formats get rid of some information to shrink the file size (thereby increasing a disk's storage capacity). We recommend saving all your work-in-progress images (equivalent to the negatives in film cameras) as TIFF files. This way they will remain at maximum quality so you can create other versions for printing or e-mailing, and can save them in smaller, compressed files like JPEGs. The advantage is that you'll always be able to recreate an effect or enhancement by starting with the original TIFF file without losing image integrity

5. What's the best battery to use in my digital camera? Is it OK to use regular alkaline batteries?
Popular alkaline batteries are inexpensive and can be found anywhere, but their power is consumed at a rapid rate. If you're using all of your camera's features, you can deplete a set of alkaline batteries in about 30 minutes! You should consider spending a little more up front for a battery charger and some rechargeable batteries.
Many cameras work with the popular, rechargeable nickel-metal hydride (NiMH) batteries. They are inexpensive and environmentally friendly, and they give you more pictures per charge than any other battery types, except for lithium-ion batteries.

6. What do digital cameras use a LCD screen for?
The LCD screen that is found on the back of digital cameras comes in very handy indeed. It has two functions. First it displays menu options. For example it controls the deletion of images that you don't want to keep. Its main function is that it allows you to see the picture that you are about to take before you take it and how it turned out afterwards. For me this is one of the biggest advantages digital cameras offer an inexperienced photographer. The ability to see exactly how you picture turned out immediately after taking it allows you to identify areas that you can improve on. It can also allow you a second chance with a photograph. If you take it and don't like the look of it you can always delete the image and take the picture again.