Fast lens
From The Glossary of Digital Photography
A lens with a large aperture (represented by a small f- number). The term came into being because the 'faster' a lens is, the higher or faster the shutter speed can be.
ONLINE GLOSSARY OF DIGITAL PHOTOGRAPY
A lens with a large aperture (represented by a small f- number). The term came into being because the 'faster' a lens is, the higher or faster the shutter speed can be.
