4 Words to use with focus

For the 3 1/4 x 4 1/4: One lens 4 or 4 1/2 focus One lens 6 or 7 focus One lens telephoto or telecentric 9 to 12 focus The camera should be made of metal and fitted with focal-plane shutter and direct view-finder.

Gathering thought's sunshine to a focus heat That blinds and burns and maddens!

The first board was clamped to the easel, the latter was slid along its guides until the pointer stood at ÷ 2 on the long-focus scale and Thorndyke proceeded to focus the camera with the aid of a little microscope that Polton had made for the purpose.

You think that curious box is some attachment for a moving picture camera; do you?" "Well, it might be, and" "And you're afraid he will get ahead of you in your invention of a focus tube; aren't you?" continued Blake, not giving his companion a chance to finish what he started to say.

4 Words to use with  focus