LikeMyLeica Posted March 20, 2013 Share #1 Posted March 20, 2013 Advertisement (gone after registration) Hello, I wonder if anyone can explain or diagnose a behaviour that to me, anyway, as a new M9 user, is a bit strange and disconcerting? I just bought a used Zeiss Biogon 2.8/25 ZM on ebay. Seems in perfectly acceptable condition. But when I mount it on my M9 (bought new last October) and try to focus with it, the whole (internal) viewfinder seems to move around, from side to side and (slightly less) up and down. Is this normal or should I be worried? I see from this thread on the Rangefinder forum that there were two versions of the Biogon 25 ZM's bayonet mount - I don't know if that has anything to do with it: http://www.rangefinderforum.com/forums/showthread.php?t=87222 The lens codes helpfully listed here mention a 'mount fix' for the Biogon 25: http://www.l-camera-forum.com/leica-news/leica-lens-codes/ The Biogon 25 shifts the viewfinder on my M8, too, though the movement seems slightly less. Any advice or reassurance will be gratefully received! Best wishes Link to post Share on other sites More sharing options...
Advertisement Posted March 20, 2013 Posted March 20, 2013 Hi LikeMyLeica, Take a look here M9 VF moves about when focusing Biogon 25 ZM. I'm sure you'll find what you were looking for!
andybarton Posted March 20, 2013 Share #2 Posted March 20, 2013 This is perfectly normal and helps to correct for parallax as the focus changes. 1 Link to post Share on other sites More sharing options...
ho_co Posted March 20, 2013 Share #3 Posted March 20, 2013 You can demonstrate this for yourself by removing the lens and pressing the cam tracking roller (top of lens opening) toward the back of the body while looking through the finder. 2 Link to post Share on other sites More sharing options...
LikeMyLeica Posted March 20, 2013 Author Share #4 Posted March 20, 2013 (edited) Well, blow me down - thank you both for putting my mind at rest! Best wishes to all, Edited March 20, 2013 by LikeMyLeica Typo Link to post Share on other sites More sharing options...
earleygallery Posted March 20, 2013 Share #5 Posted March 20, 2013 LOL this question crops up once a quarter on average, "help, I think I've broken my viewfinder"! I know no one reads the manual but...... Link to post Share on other sites More sharing options...
tobey bilek Posted March 20, 2013 Share #6 Posted March 20, 2013 Amazing what the engineers can think of. Link to post Share on other sites More sharing options...
LikeMyLeica Posted March 22, 2013 Author Share #7 Posted March 22, 2013 Advertisement (gone after registration) LOL this question crops up once a quarter on average, "help, I think I've broken my viewfinder"! I know no one reads the manual but...... As far as I can see, it's not mentioned anywhere in the manual, is it? Link to post Share on other sites More sharing options...
jaapv Posted March 22, 2013 Share #8 Posted March 22, 2013 Page 131 in the middle of the left hand column. Link to post Share on other sites More sharing options...
marknorton Posted March 22, 2013 Share #9 Posted March 22, 2013 Amazing what the engineers can think of. They thought of it, what, 50+ years ago... Link to post Share on other sites More sharing options...
haroldp Posted March 22, 2013 Share #10 Posted March 22, 2013 They thought of it, what, 50+ years ago... My M2 does it and it is circa 1958 or so. I bought it used in 1965. Still works. ... H Link to post Share on other sites More sharing options...
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