Archived posting to the Leica Users Group, 2002/11/12

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Subject: [Leica] M3 pressure plate not working?
From: Amilcar de Oliveira <>
Date: Tue, 12 Nov 2002 13:45:41 -0200

Hi everibody,

My "new" M3 and DR Summicron are showing an interesting condition: when 
I shoot at f:2 and print the negs rebate to get that thin black line 
around the picture, I notice that the black line on the top of the image 
is sharp. However, the black line on the sides and bottom of the picture 
is not sharp. At f:16, the black line is sharp all around. My enlarger 
has just been checked for parallelism and the image shows grain to the 
corners. Does that mean that the pressure plate is not pushing the film 
evenly against the aperture? My photos appear to be correctly focused 
but I wonder if I could get a little more sharpness (don't we all?). The 
real worry is focusing 90 and 135m (when I get them). Should I stop 

Thanks for your help,


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