Originally Posted by
Struan Gray
The easy way is to use a lens with 4x5 (or 5x7) coverage and shift the rear standard.
Otherwise, you can move the rail clamp close to the front standard (in front, if necessary) and use the focussing mechanism to get the entrance pupil over the rotation point. This works on my Norma, but I don't know if the F has enough movement.
If that fails, you can get a cone or recessed lensboard to move the lens further from the standard axis so that there is room for the rail clamp underneath.
NB: for stitched panoramas you want to rotate about the entrance pupil, not one of the nodal points. The method given in countless online forums for finding the 'nodal point' (rotate camera and eliminate parallax on the ground glass) actually finds the entrance pupil, so in practice it's hard to go wrong. Most LF lenses are symmetrical enough that if you're not doing closeups you can assume the pupil is at the lensboard - especially wide angles like 90s and 65s.
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