Hi all,
Just about to build a fixed focal length, hyper'-focus camera, using a 65mm 4.5 Rodenstock Grandagon-N and need some help finding the distance requirements from the lens to film.
The data sheets state that this lens has a Flange Focal Length of 70.0mm (Based on Copal Shutte for Scale 1:Inf')
Does this mean the distance from the front (forward face) of the lens board to the film when focused to infinity?
I've read a few posts on Nodes etc and got very confused...so some one might have to explain in simpler terms (Sorry).
Also, how would I work out the travel of helical required to go from infinity to say 3 or 1 meters?
As this will be my first build, I don't want spend a fortune and will be buying a cheap 'Evilbay' Helicoil and having a play (I already own the lens from my LF gear). I would just like to know the distances first to find the best suited helicoil. Once I have the Helicoil, I will install a temporary G/Glass and mark the focus knob with set distances.
Thanks in advanced.
Mark
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