Photo: Abby Ferguson Interchangeable lens cameras, or cameras that let you swap out lenses, can unlock a lot of opportunities ...

Lenses are usually made from glass or plastic ... Just like ray diagrams showing reflection, all angles are measured from the normal – a line at 90° to the refracting surface.

A 2:1 anamorphic lens squeezes 100% more into the frame than a normal lens. The term comes from the Greek "anamorphosis," which means to "reshape." See anamorphic DVD. THIS DEFINITION IS FOR ...