Digital Camera Lenses

* Speed. This refers to the maximum aperture of the lens, or the maximum amount of light that the lens takes in. A fast lens let in more light, while the slow lens does not. Fast lenses are designed for dark conditions. The slow lenses, on the other hand, are made for lighter conditions. The maximum aperture is measured in f/stop number. This is a ratio between the size of the lens and the focal length;

* Zoom lens. These lenses give a range variety of focal lengths in just one adjustable lens. However, not all of these lenses have a constant maximum aperture. The ones that have maximum aperture are more expensive.

* Add-on lenses. These are accessories that are made for consumer digital cameras. This is an inexpensive feature that can increase or reduce the built-in focal length of the camera. It can lengthen the telephoto focal length to 300% or decrease the wide-angle focal length to 30%. There are other relative pointers for buying the best lens for your camera. For instance, aspheric lens elements can produce sharp photos. Low-dispersion glass lenses can lessen the possibility of blurry pictures. Also, try to consider the stabilization system of the camera. This also helps in producing very precise images. Always take time to ask yourself what you really want in a new lens. Make sure it will serve its purpose. If you are still not sure, try several lenses, compare the results and then decide.