LotharZhou Posted January 19, 2012 Share #1 Posted January 19, 2012 Advertisement (gone after registration) I made some comparion shots last night, mounted my almost new chrome 35 summicron asph and the Nokton 35 F1.2(V1) on tripod on M8, After twice calibration from Solmser, the summicron still renders less sharp compare to the CV nokton in the center, both at F2. However the cron performed better in the outer zone. Leica previously stated the cron was supposed to be used for analog cameras and for restricted digital camera use. I just can't figure out why it is not even as sharp as the Nokton in the center. Also one more thing I noticed is, the Nokton had shallower DOF than the cron, at the same F stop and same shutter speed. Any comments are more than welcome, I will post some images as soon as I get home. Link to post Share on other sites More sharing options...
Advertisement Posted January 19, 2012 Posted January 19, 2012 Hi LotharZhou, Take a look here the 35 summicron asph sharpness issue continued. I'm sure you'll find what you were looking for!
stunsworth Posted January 19, 2012 Share #2 Posted January 19, 2012 ILeica previously stated the cron was supposed to be used for analog cameras and for restricted digital camera use You may be right, but this it the first time I've heard it. There were some focus shift issues with the 35mm ASPH Summilux that would be more apparent on digital than film, but I've heard nothing about the ASPH Summicron suffering from problems. Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #3 Posted January 19, 2012 I attached some test photos, also I have done test with my GF1 for both lens, still appears that the nokton is sharp in the center, I doult it's a simpe focus shift issue. Link to post Share on other sites More sharing options...
jaapv Posted January 19, 2012 Share #4 Posted January 19, 2012 Leica previously stated the cron was supposed to be used for analog cameras and for restricted digital camera use. I would ask you for a reference here. That is the first time I have heard of this, and from experience, it bears no relationship to reality. Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #5 Posted January 19, 2012 please see the attached images Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #6 Posted January 19, 2012 Hi Japp, this is the reply from Leica: Dear Mr. Zhou, Thank you for your mail. We forwarded your lens to our quality control department. They just told us that there is no fault with the lens. It was constructed for analog cameras and is for use with digital cameras restricted only. When do you leave Germany? Kind regards Customer Service Ursula Brand-Gerheim Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #7 Posted January 19, 2012 Advertisement (gone after registration) strange no pictures attached, I will get some pictures tonight. Thanks! Link to post Share on other sites More sharing options...
jaapv Posted January 19, 2012 Share #8 Posted January 19, 2012 Hi Japp, this is the reply from Leica: Dear Mr. Zhou, Thank you for your mail. We forwarded your lens to our quality control department. They just told us that there is no fault with the lens. It was constructed for analog cameras and is for use with digital cameras restricted only. When do you leave Germany? Kind regards Customer Service Ursula Brand-Gerheim To all M8 - M9 owners! As all your lenses designed before 2006 have now become worthless and unusable please send them to me and I will dispose of them according to EU rules - at a modest fee of 50 Euro per lens. What blathering nonsense! I just mailed Leica to comment on this. Link to post Share on other sites More sharing options...
lct Posted January 19, 2012 Share #9 Posted January 19, 2012 I have no experience with the Nokton 35/1.2 but according to Jean-Marie Sepulchre (pages 167 & 174) it is slighty sharper in the center but vastly softer on edges and corners at f/2 compared to the Summicron 35/2 asph on the M9. Link to post Share on other sites More sharing options...
01af Posted January 19, 2012 Share #10 Posted January 19, 2012 After twice calibration from Solms, the Summicron still renders less sharp compare to the Voigtländer Nokton in the center, both at f/2. In my experience, the technicians at Solms are pretty bad at calibrating lenses. Having your lens calibrated twice does not necessarily mean it was fine now. It rather is like playing the lottery. After calibration, a lens' focus accuracy might be perfect, or better than before but still less than perfect, or just the same as before, or even worse than before. Been there, done that However the Summicron performed better in the outer zone. This could be evidence that (a) the focus isn't totally off but only slightly, and ( the lens has some field curvature—which is perfectly normal with most lenses but the focus should be perfect at the frame's center, not somewhere near the frame's borders. Also one more thing I noticed is, the Nokton had shallower DOF than the Summicron, at the same f-stop and same shutter speed. Yes ... depth-of-field is a way more complex field than most people are aware of. Two different lenses with the same focal length, used at the same aperture and the same focusing distance on the same camera, can (and often will) yield different depths-of-field. Please see the attached images. I don't see any images attached anywhere Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #11 Posted January 19, 2012 Thanks again for the very useful comments, as I said, I mounted both lens on GF1 via converter on tripod and test it again. The center of the Nokton clearly sharper than that of the summicron at F2. I will definitely post pictures tonight. Overall, the nokton renders sharper and higher contrast image than the summicron at the same setting on tripot. Also good to mention my CV color skopar also much sharper than my new cron in the center. And more contrasty. Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #12 Posted January 19, 2012 also please see the old thread http://www.l-camera-forum.com/leica-forum/leica-m8-forum/186678-new-2-35mm-asph-center-sharpness.html Link to post Share on other sites More sharing options...
lct Posted January 19, 2012 Share #13 Posted January 19, 2012 Lothar, there is no reason why you'd get more accurate results on a non Leica body with adapter. Could you show your M8 pics instead? According to Sepulchre (my link above) the difference should be very slight in the center. Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #14 Posted January 19, 2012 yes I will, my internet connection is horrible however I will try to upload the M8 images later. It is definitely softer by any eyes. However the GF1 images show exactly the same issue. Lothar, there is no reason why you'd get more accurate results on a non Leica body with adapter. Could you show your M8 pics instead? According to Sepulchre (my link above) the difference should be very slight in the center. Link to post Share on other sites More sharing options...
tobey bilek Posted January 19, 2012 Share #15 Posted January 19, 2012 Guess I am sticking with 35 my Version IV if the ASPH is no good for digital. No way am I am buying CV stuff after my 25 shows the whole left side fuzzy on my M8. Anyone have side by side photos of version 4 and ASPH they can show, same time same place same f stop. Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #16 Posted January 19, 2012 it's true my both copies of the CV35mm skopar show fuzzy on each side. But the center is the sharpest I have seen, much sharper than my 35mm cron. Not in the same league, this isn't normal. Guess I am sticking with 35 my Version IV if the ASPH is no good for digital. No way am I am buying CV stuff after my 25 shows the whole left side fuzzy on my M8. Anyone have side by side photos of version 4 and ASPH they can show, same time same place same f stop. Link to post Share on other sites More sharing options...
Cyril Jayant Posted January 19, 2012 Share #17 Posted January 19, 2012 What is miracle that works with my 35mm.asp lens then? This is my favourite lens and It's quality is outstanding? There's something wrong somewhere and best thing is to do shooting without this looking in to this Leica statement. Link to post Share on other sites More sharing options...
jaapv Posted January 19, 2012 Share #18 Posted January 19, 2012 Guess I am sticking with 35 my Version IV if the ASPH is no good for digital. No way am I am buying CV stuff after my 25 shows the whole left side fuzzy on my M8. Anyone have side by side photos of version 4 and ASPH they can show, same time same place same f stop. It is absolute nonsense Tobey - I had a 35 asph and it is a beautifully drawing lens. I would call it first choice for the M9 in its class. Utter sharpness in the middle is useless if a lens loses it towards the edges. It only makes for oversharpened centres in postprocessing. The Summicron version IV is considerably less precise in drawing than the asph Not talking about character here, but in absolute quality the asph is as good wide open as the version 4 is at 5.6 or maybe 4.0 (See Erwin Puts). Having said that, I quite like the older Summicrons and would even take one of those over the CV offerings. (I had the Nokton and sold it) Right now I am happy with the Summicron 40, but would never put it up against the asph in a sharpness contest. Link to post Share on other sites More sharing options...
lct Posted January 19, 2012 Share #19 Posted January 19, 2012 Guess I am sticking with 35 my Version IV if the ASPH is no good for digital. […] Anyone have side by side photos of version 4 and ASPH they can show, same time same place same f stop. Sorry no but i have both lenses and the asph is obviously sharper than the v4 at full aperture. I would not say that it is as sharp at f/2 than the v4 at f/4 though. Link to post Share on other sites More sharing options...
LotharZhou Posted January 19, 2012 Author Share #20 Posted January 19, 2012 The pictures, this is the cron 35 asph, center at F2 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/170861-the-35-summicron-asph-sharpness-issue-continued/?do=findComment&comment=1902685'>More sharing options...
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