Hot answers tagged

2

There are two different variables in play here: focusing distance and object distance. Chromatic aberration correction is with some priority employed to stop colored fringes to appear when focusing on infinity: when everything is in the "default" out-of-focus situation, colorful fringes are really undesirable. A similar reverse "default"...


1

The job of the lens is to project an image of the outside world on the surface of film or digital sensor. To do this job, light rays from the subject traverse the lens and the shape of the lens surfaces and the density of the lens alter their travel path. In other words, the lens acts a light wave guide. The focal length is a measure of the distance, lens to ...


Only top voted, non community-wiki answers of a minimum length are eligible