How do I know which lens to chose?

We recommend using a lens calculator to determine which lens best fits your application. Enter the distance from the camera to your subject and at that distance, the desired width. Click the calculate button and it will display the focal length of the lens that meets your needs. You can then look at the order form to see which if the lenses most closely fits your application.  If you don't see an exact match, you can opt for a varifocal or zoom lens.

*Both varifocal lenses and  zoom lenses allow you vary the focal length (i.e. the zoom level or field of view).