subject: Good Quality Digital Cameras Have Ground Glass Lens [print this page] The quality of the lens can make a significant difference in the clarity of that image. Very cheap digital cameras may even use a piece of plastic as the lens, which will usually have an uneven surface and light transmission. This will be noticeable in the picture but may not be an issue for a security camera or a web cam. Better quality digital cameras will have ground-glass lens and high-end digital cameras will even have interchangeable lenses as do high-end film cameras. The lens still plays the important role of bringing light clearly to the CCD surface for a distortion free picture.
So the second set of numbers on this lens would be 35mm-136mm. This is commonly called the 35mm equivalent. These are the numbers you should pay attention to when checking different cameras for focal range as they will be more familiar to you.
Even a six megapixel camera will provide great images up to an exceeding 20 x 24. Most people do not make enlargements larger than 8 x 10 and so much of this resolution is wasted on almost all the photography. While these high resolutions may sound cool, for many people it may be just wasted money. Most people will be more than happy with a digital camera in the Six to eight megapixel range.
Digital cameras have two kinds of zoom, optical and digital. In this case, focus on the optical zoom. It's the one that actually uses the lens' optics to bring the subject closer. The higher the number, the further away you can "pull in" your subject. The digital zoom merely takes the original information and makes it bigger, and once again, clarity is sacrificed. Most serious photographers turn off digital zoom.
Digital cameras are used in many devices from mobile phones to personal digital assistants and vehicles. The Hubble space telescope and other astronomical devices are having specialized digital cameras. There are high-tech digital cameras available in the market with which one can take underwater photographs. The underwater digital cameras are very useful in capturing sealife, scuba diving and something artistic under the sea.
If your camera supports long lasting battery, you need not spoil the fun of clicking by worrying on the current life span of your camera at all.
