Hi
Advice appreciated, my MPP mkVIII is focusing 2ft further back than it should over a distance of 12 ft (symmar 150 apo wide open) my thinking has been the glass is further back than the film plane to cause this- (the back does look appallingly made- bumpy milling et al) so I have placed the focusing screen holder/ international back on sheet of wet and dry and ground off a fraction of a mil- rotating it as I go to keep things even- I am now having doubts as it is still considerably out.
The ground glass is facing the lens , no fresnels or anything and i am focusing with a loupe on the filament of a torch to ensure absolute precision.
thoughts gratefully appreciated
Ric
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