A digital camera is what a majority of people use for photography.  They buy a camera from the market without learning much about the camera lens.  This results in problems cropping up when they want to update the camera because of issues relating to compatibility. People who are in the know of things usually possess a camera and camera lens in an ideal combination. Repeating the mistake regarding compatibility will become a costly affair. All visual effects are captured in a photo only through the lens and therefore sufficient importance is to be given in its choice and use. 

Manufacture of camera lens is a highly technical and specialized field. The quality of the picture taken through the camera will largely depend on the quality of the camera lens and also how it is used. Buying them only from established and reputed manufacturers is very vital for getting good photo images with clarity and sharpness, without any distortions. The lens is made of glass as well as plastic material.  The glass lens is heavier than a plastic one.  But the clarity you can get using a glass lens cannot be got if you use a plastic lens.

According to the purpose for which the camera is going to be used you have to fit the correct camera lens. Different photos can be got using different type of lenses.  Some of the uses are taking photos, in the normal way, wide angle shots, telephoto, and zooming effects etc. The camera lens used for every one of such uses will be different. Most of the time a camera is used only for taking normal photographs and the camera remains with a camera lens suitable for this purpose.  When the type of photo to be taken changes you change the lens suitable for the purpose.

Any person using a camera should have some basic knowledge about a camera lens. He should be familiar with the type of lens fitted on his camera, if focal length, its interchangeability for use in other cameras etc. A person learns more about the camera lens, as he gets experienced in using the camera. He will come to realize many requirements for obtaining sharp pictures from any angle and that will lead to his trying to learn more and more about cameras the lenses that have been used their speed etc.