被写界深度 Depth of field

Creator:	Marc Brunet
Language pair:	Japanese to English
Discipline:	-
Definition / notes:	Relative to the camera lens, depth of distance interval, from closest to most distant, that remain sharp and in focus. This can vary greatly depending on the type of lens used for specific purposes. It is also inversely proportional to the aperture value set.
URL:	http://ja.wikipedia.org/wiki/%E7%B5%9E%E3%82%8A_(%E5%85%89%E5%AD%A6)#.E8.93.AE.E6.A0.B9.E7.B5.9E.E3.82.8A