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Camera composition
Nov 24, 2016

Lens

Scene like focusing the lens on film. To make the different locations is subject to clear, with the exception of lens itself needs correction

Like external, should also keep the object distance, like from the conjugate relationship. To that end, should be able to move back and forth to focus the lens, so the camera should have the focusing mechanism.

Different brands of DSLR cameras typically use a different card, the following table lists some common lens mount.