How Lenses Function
12:05
How Optics Work - the basics of cameras, lenses and telescopes
13:28
Why lenses can't make perfect images
18:13
Convex and Concave Lenses
15:44
All about LENSES! Zoom, prime, fast, slow, aperture, focal length and more!
4:32
Canon - Fluorite Lenses The Ultimate High Performance Lenses
8:32
How Does a DSLR Camera Work
6:24
5 Illegal LENS Modifications
17:21