I am having problems with two 4x5 lenses both mounted on a Linhof recessed wide angle lensboard. Those two lenses are a Schneider 47XL and a Nikon 90 f4.5 Both lenses were purchased new.
The problem is that if I tighten the retaining screw with my spanner wrench so that the lenses do not rotate on the lensboard I have problems opening and closing the lens prior or after making an exposure.
There is something that presses on the the mechanism which controls the opening and closing of the lens. I don't know if I am doing something wrong, or if I need a washer between the lens and the lensboard, or something else that I don't know about.
If you have had this problem, or know the solution, I really appreciate that you help me with this. This problem does not happen with all lenses, just with these two lenses.
Thank you.
Alain
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