Definition: Describes 1. a film or paper that is very sensitive to light; 2 a lens of wide maximum aperture, relative to its focal length, allowing maximum light into the camera in minimum time. The speed of a lens - its relative ability to take in light - is an important measure of its optical efficiency: fast lenses are more difficult to design and manufacture than slow lenses, and consequently cost more. ; 3. a short shutter speed. Opposite: slow.
0 komentar:
Post a Comment