Archived posting to the Leica Users Group, 1999/01/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]This is a multi-part message in MIME format. - --------------4BDB390FE7D8EF9ED72F984F Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Walter S Delesandri wrote: SNIP > The main PROBLEM with the 90 f2 is focusing it wide open with an > M4-6 rangefinder. It requires care. When I had questions about > focus, I put it on both my M bodies, and used a ground glass.... > checked at 10' and 3' -- it was PERFECT.....so any focus problem > was my fault!!SNIP > raid of the Summicron. > > Cheers, > Walt > Walt, please tell me your ground glass procedure. I'm assuming you've got a piece of ground glass that will fit in the film rails with the back open and that somehow you secure it flat at the film plane. Then I assume you loupe the image (much like on a view camera) with the lens focused on a target at the measured distances you cited. Hopefully, the focus scale of the lens, the measured distance and the coincident images in the rangefinder all agree. Am I correctly describing the procedure and where did you get a piece of ground glass that small? Carl Socolow - --------------4BDB390FE7D8EF9ED72F984F Content-Type: text/x-vcard; charset=us-ascii; name="csocolow.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for csocolow Content-Disposition: attachment; filename="csocolow.vcf" begin:vcard n:Socolow;Carl x-mozilla-html:FALSE org:Socolow Photography adr:;;;Camp Hill;PA;17011;USA version:2.1 email;internet:csocolow@microserve.net note:ICQ 9562608 fn:Carl Socolow end:vcard - --------------4BDB390FE7D8EF9ED72F984F--