This query might be better filed under the 'you're just being paranoid' section but...
All the specs I have seen for the distance from the outer face of the film holder to the septum (for 5x7) have said 0.228", +/-0.010" (so between 0.218" and 0.238").
However when I measure a Fidelity Deluxe holder (for instance) I get more like 0.204".
My calipers are good quality digital ones but admittedly it is tricky to measure accurately with the pointy depth thing.
Can anyone confirm the correct distance? This is to make a removeable ground glass 'frame' that will be interchangeable between several 5x7 cameras.
I'd also be interested to know how critical the accuracy is with regard to focus and the end result (I guess the quoted tolerance is the guide here), and where does film thickness come into it?
Thanks!
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