LeicaGuyUK Posted August 4 Share #1 Posted August 4 (edited) Advertisement (gone after registration) Hi, I have been struggling with a summarit 50 lately in regards to focussing. I`ve finally got around to testing it with a testing chart and I think it confirms it... First test was with a distagon 35mm 1.4 that i know is spot on, using the rangefinder or EVF on my M11 results in a good sharp shot. The Summarit looks to be ok via the EFV but when looking through the viewfinder its quite a bit off. Image 1 is the 35 distagon, image 2 is the summarit 50 via the EVF and image 3 is the summarit 50 via the rangefinder... Any thoughts? Its a quick and dirty test but i think it may conclude it? The lens was serviced via camserve here in the UK recently so it`s a shame if it is still out... Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Edited August 4 by LeicaGuyUK Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/423491-summarit-50mm-24-possible-front-focssing-issue/?do=findComment&comment=5843461'>More sharing options...
Advertisement Posted August 4 Posted August 4 Hi LeicaGuyUK, Take a look here Summarit 50mm 2.4 Possible front focssing issue. I'm sure you'll find what you were looking for!
LeicaGuyUK Posted August 4 Author Share #2 Posted August 4 Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/423491-summarit-50mm-24-possible-front-focssing-issue/?do=findComment&comment=5843462'>More sharing options...
LeicaGuyUK Posted August 4 Author Share #3 Posted August 4 Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/423491-summarit-50mm-24-possible-front-focssing-issue/?do=findComment&comment=5843464'>More sharing options...
Carlos cruz Posted August 4 Share #4 Posted August 4 Looks like 10cm off to me. If it still fits under ‘recently serviced’ category I would suggest they give it a second look Link to post Share on other sites More sharing options...
LeicaGuyUK Posted August 4 Author Share #5 Posted August 4 15 minutes ago, Carlos cruz said: Looks like 10cm off to me. If it still fits under ‘recently serviced’ category I would suggest they give it a second look Yep that`s my thoughts also. I know it`s fairly obvious but wanted to rule my M11 out first so presume if EVF is good on this lens and EVF/RF is good on other lenses with the body I can rule the RF on the M11 out of the equazion Link to post Share on other sites More sharing options...
jgeenen Posted August 4 Share #6 Posted August 4 (edited) Looks off, but your setup seems not be perfectly leveled (the "D" below the QR code seems to be sharper in all images). Secondly, the 35mm reference image seems to be sightly front as well (could be caused by the leveling). Once your setup is perfectly leveled, do a series (never rely on a single photo): Take 10 photos with rangefinder wide open, all of them focusing individually coming from infinity. If all ten are equally off and in the same direction, a focussing misalignment is probable. Try to repeat the same series in portrait mode. Under normal circumstances with a test pattern you used there should be (a) a hit rate of at least 8 out of 10, and (b) the vertical test series should look similar. Edited August 4 by jgeenen 1 Link to post Share on other sites More sharing options...
jankap Posted August 4 Share #7 Posted August 4 Advertisement (gone after registration) Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Pictures 1, 2, and 3 from left to right. Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Pictures 1, 2, and 3 from left to right. ' data-webShareUrl='https://www.l-camera-forum.com/topic/423491-summarit-50mm-24-possible-front-focssing-issue/?do=findComment&comment=5843492'>More sharing options...
LeicaGuyUK Posted August 4 Author Share #8 Posted August 4 15 minutes ago, jankap said: Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Pictures 1, 2, and 3 from left to right. I presume i can denote from that the Summarit 50 is way off and this is not an issue with the rangefinder itself? Link to post Share on other sites More sharing options...
LeicaGuyUK Posted August 4 Author Share #9 Posted August 4 38 minutes ago, jgeenen said: Looks off, but your setup seems not be perfectly leveled (the "D" below the QR code seems to be sharper in all images). Secondly, the 35mm reference image seems to be sightly front as well (could be caused by the leveling). Once your setup is perfectly leveled, do a series (never rely on a single photo): Take 10 photos with rangefinder wide open, all of them focusing individually coming from infinity. If all ten are equally off and in the same direction, a focussing misalignment is probable. Try to repeat the same series in portrait mode. Under normal circumstances with a test pattern you used there should be (a) a hit rate of at least 8 out of 10, and (b) the vertical test series should look similar. Ah maybe! I used the level on the body until all was green and assumed as the patch was hitting the middle of the barcode it would have been level. I think on this instance it`s not that i`m looking for perfection but to confirm if this lens is way off and at the moment un-usable with the RF. Link to post Share on other sites More sharing options...
LeicaGuyUK Posted August 4 Author Share #10 Posted August 4 18 minutes ago, jankap said: Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Pictures 1, 2, and 3 from left to right. Forgot to ask What did you do processing wise to display that? Link to post Share on other sites More sharing options...
jankap Posted August 4 Share #11 Posted August 4 1 hour ago, LeicaGuyUK said: Forgot to ask What did you do processing wise to display that? I use "FastRawViewer" on my Mac. You have to adjust somewhat. Then with the key "p" of the keyboard there are 3 views. I have made screen photos of your results. For the Distagon picture you write Rangefinder or LCD. The LCD always gives a sharp picture. The problem is the rangefinder, the parallel optical path. Leica has adjusted the Summarit for the rangefinder as it was new, but the technicians, who perform a CLA or make repairs, seldom have to do with rangefinders. New, with every Leica camera every Leica lens can be used via rangefinder coupling. Also the LTM lenses are very good with the adapter. The difference between M and LTM is 1.00 mm in flange distance. How many zeros I don´t know, tolerances.😀 1 Link to post Share on other sites More sharing options...
LeicaGuyUK Posted August 5 Author Share #12 Posted August 5 11 hours ago, jankap said: I use "FastRawViewer" on my Mac. You have to adjust somewhat. Then with the key "p" of the keyboard there are 3 views. I have made screen photos of your results. For the Distagon picture you write Rangefinder or LCD. The LCD always gives a sharp picture. The problem is the rangefinder, the parallel optical path. Leica has adjusted the Summarit for the rangefinder as it was new, but the technicians, who perform a CLA or make repairs, seldom have to do with rangefinders. New, with every Leica camera every Leica lens can be used via rangefinder coupling. Also the LTM lenses are very good with the adapter. The difference between M and LTM is 1.00 mm in flange distance. How many zeros I don´t know, tolerances.😀 Sure The lens was sent back to a repair center here to have that calibrated as it was off when i bought it second hand, looks like they either didnt perform that or have not done it properly. I`m in touch with them to see if they can take it back a second time and get this calibrated. I`m going to assume at this point the M11 isn`t the issue. Link to post Share on other sites More sharing options...
jankap Posted August 5 Share #13 Posted August 5 Do you remember, at what distance the Summarit was set at the second picture? If the M11 would be the issue, then the Distagon too!😉 Link to post Share on other sites More sharing options...
LeicaGuyUK Posted August 5 Author Share #14 Posted August 5 56 minutes ago, jankap said: Do you remember, at what distance the Summarit was set at the second picture? If the M11 would be the issue, then the Distagon too!😉 It was 2m away from the target. Sure, the distagon to me looks fine and also my ultron 28 II also seems to look ok via the RF so i think i can rule the RF itself out 1 Link to post Share on other sites More sharing options...
lct Posted August 5 Share #15 Posted August 5 21 hours ago, LeicaGuyUK said: The Summarit looks to be ok via the EFV but when looking through the viewfinder its quite a bit off. If it is OK via the EVF the lens is not the culprit i suspect. But how did you check focus accuracy via the EVF? At working aperture or at full aperture? With focus magnification, focus peaking or both? Just curious as ruling the RF out seems premature at this stage. Link to post Share on other sites More sharing options...
LeicaGuyUK Posted August 5 Author Share #16 Posted August 5 (edited) 17 minutes ago, lct said: If it is OK via the EVF the lens is not the culprit i suspect. But how did you check focus accuracy via the EVF? At working aperture or at full aperture? With focus magnification, focus peaking or both? Just curious as ruling the RF out seems premature at this stage. The summarit is ok via the evf but not via the RF. The distagon is ok via the EVF and is ok via the RF. My voigtlander 28 ultron II is also ok via the EVF and ok via the RF. As the other two lenses are ok via the RF i would think that the M11 RF is ok? I shot them all wide open from 2m, i figured it would highlight any inacuracies? On the EVF i used peaking and magnification. Edited August 5 by LeicaGuyUK Link to post Share on other sites More sharing options...
lct Posted August 5 Share #17 Posted August 5 In my experience with 20+ M lenses, when focusing is OK with the EVF + focus magnification at close, medium and far distance, possible focusing issues do not come from the lens. Link to post Share on other sites More sharing options...
Carlos cruz Posted August 5 Share #18 Posted August 5 28 minutes ago, lct said: In my experience with 20+ M lenses, when focusing is OK with the EVF + focus magnification at close, medium and far distance, possible focusing issues do not come from the lens. With lens freshly released from repair and two wide lenses (with less back focus) focusing ok via rf and evf I wouldn’t be so trusting. If rangefinder mechanism was off it would show on other lenses too. Before raising an issue with camera repairer I’d just run tests again with all scientific regalia needed. Link to post Share on other sites More sharing options...
lct Posted August 5 Share #19 Posted August 5 Easy to test the lens at close, medium and far distance with the EVF. Would allow to rule the lens in or out re the focus issue and see what to do afterwards. Link to post Share on other sites More sharing options...
Jon Warwick Posted August 5 Share #20 Posted August 5 (edited) 6 hours ago, LeicaGuyUK said: The summarit is ok via the evf but not via the RF. Does your Summarit reach infinity focus? ie, at f2.4, and using a very distant subject, is that distant subject in accurate focus, or is something else in the frame (which is much closer to you) in sharper focus instead? Edited August 5 by Jon Warwick Link to post Share on other sites More sharing options...
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