Originally posted by richardh
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G'day Richard
The focal length really worries me, because as you obviously know, any error in that regard will throw all the perspectives out, can you give me any insight into how you calculated it and what plate size did you use when working it out [or did you do as I would and not worry about the actual plate size and simply calculate it to say a 5X4?].
If I can assist with the maths re the outside photo give me a yell as once upon a time it was my strong suite however I admit it is pretty rusty know.
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