I hope somebody can help me here. I have a very old 4x5 enlarger I have happily used for some time now though it is sort of junky, a "De Jure." It is a conden ser enlarger. I have been using a 135 mm lens for my 4x5 negatives with no prob lems. But recently I acquired an 80 mm lens (Schneider Companon-S) so that I may enlar ge 6x6 negatives with more ease. Only trouble is, the damn thing casts a tiny i mage - too small for the negative. There is massive light fall-off on the edges . So I lent the lens to my father who has a 6x6 enlarger and he used it on his enlarger with no trouble. But I can't get it to work on mine. Is there something about my enlarger that prevents me from using this lens? Sho uldn't a 4x5 enlarger/condenser head work fine with all formats smaller than 4x5 ? It is not vignetting on something internal. Any suggestions would be very we lcome. Thanks Erik Ryberg
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