Hello all.
I am going to start testing some of my lenses, but my geometry is a bit rusty, it's been in an old cardboard box in the garage for 15 years, and I didnt pack it with a silicone beads.
So.. If I want to use a target that is 20x the size it appears on the negative, can I just multiply the focal length of the lens by 20 and set the target at that distance?? I dont think it is that simple.
Thanks!
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