Archived posting to the Leica Users Group, 2007/04/20

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Subject: [Leica] 49 to 46 Step down ring was Leica Service in Hong Kong
From: red735i at earthlink.net (Frank Filippone)
Date: Fri Apr 20 16:48:14 2007
References: <200704201322.l3KDM505022142@server1.waverley.reid.org> <3AAD8C70-533A-4FE0-BE59-BB2B6348C73A@netvigator.com> <53EF6377-AA85-4E85-9C99-E8A8BB70CA75@comcast.net>

Well.. on any M camera, open the back door.  Set lens to F wide open.  Lock 
shutter to B ( shutter open) .  Focus or not.
Look through the rear door at the corners through the extreme other corner 
of the lens.....  If you  see anything other ( darker)
than image, you have vignetting.

Now that is easy.....

Frank Filippone
red735i@earthlink.net 


Not to mention the vignetting is easy to check on the M8 display!   
With film, you have to process a roll, or stick a piece of paper over  
the back and use it like a ground glass to see.

Tom




Replies: Reply from tomschofield at comcast.net (Tom Schofield) ([Leica] 49 to 46 Step down ring was Leica Service in Hong Kong)
In reply to: Message from cummer at netvigator.com (Howard Cummer) ([Leica] 49 to 46 Step down ring was Leica Service in Hong Kong)
Message from tomschofield at comcast.net (Tom Schofield) ([Leica] 49 to 46 Step down ring was Leica Service in Hong Kong)