So, I'm sure there is a formula or online calculator or spreadsheet somewhere to help calculate the answer to this but, here's what I'd like know:
On a 8x10 camera, using a 450mm lens, with a person standing 15 feet away from the lens, what is the required bellows extension to get a head-and-shoulders shot?
Can someone point me to some resources I can study?
thanx much
jrp
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