Mauribix Posted July 30, 2008 Share #1 Posted July 30, 2008 Advertisement (gone after registration) Hi there folks! May you please tell me something or post some samples to describe the vignetting differences of these two 35mm lenses at full aperture on film? Thanks Link to post Share on other sites More sharing options...
Advertisement Posted July 30, 2008 Posted July 30, 2008 Hi Mauribix, Take a look here 35 cron ASPH vs IV (vignetting). I'm sure you'll find what you were looking for!
kenneth Posted July 31, 2008 Share #2 Posted July 31, 2008 Hi there folks!May you please tell me something or post some samples to describe the vignetting differences of these two 35mm lenses at full aperture on film? Thanks I have a 35mm Summicrom asph and it doesn't seem to have the problems you are finding or imagining Link to post Share on other sites More sharing options...
Mauribix Posted July 31, 2008 Author Share #3 Posted July 31, 2008 I have a 35mm Summicrom asph and it doesn't seem to have the problems you are finding or imagining I've got the 35 cron ASPH too. I am curious to see your copy that doesn't vignette on the full frame (24x36) film. It has to be something really rare, since without the firmware correction it vignettes on the M8 too. MTF charts by Leica and Sean Reid's test confirm this. Link to post Share on other sites More sharing options...
lct Posted July 31, 2008 Share #4 Posted July 31, 2008 Despite its good micro lenses, the M8 cannot be considered a reference in matter of light fall-off IMHO but all lenses vignette more or less obviously, including the 35mm Leica. (Did not retrieve the chart of the 35/2 IV unfortunately.) Vignetting charts of the 35/1.4 asph and 35/2 asph: Sources: http://en.leica-camera.com/assets/file/download.php?filename=file_1755.pdf http://en.leica-camera.com/assets/file/download.php?filename=file_1743.pdf Link to post Share on other sites More sharing options...
andybarton Posted July 31, 2008 Share #5 Posted July 31, 2008 A 35 ASPH does vignette a bit on film. Link to post Share on other sites More sharing options...
Mauribix Posted July 31, 2008 Author Share #6 Posted July 31, 2008 A 35 ASPH does vignette a bit on film. Thanks Andy. So it's not only my impression. Do you think (if you had or have one) that the Cron IV does vignette less than the ASPH? Maybe I just have a good copy, but mine feel is that the cron IV has got quite the same vignetting as the 35cron ASPH if not less... Unfortunately I can't test it right now since my M6 is not with me (and it won't be there for a long time, I think). Link to post Share on other sites More sharing options...
Mauribix Posted July 31, 2008 Author Share #7 Posted July 31, 2008 Advertisement (gone after registration) Despite its good micro lenses, the M8 cannot be considered a reference in matter of light fall-off IMHO but all lenses vignette more or less obviously, including the 35mm Leica.(Did not retrieve the chart of the 35/2 IV unfortunately.) Vignetting charts of the 35/1.4 asph and 35/2 asph: Sources: http://en.leica-camera.com/assets/file/download.php?filename=file_1755.pdf http://en.leica-camera.com/assets/file/download.php?filename=file_1743.pdf Thanks LCT, It would be really nice to have the cron IV graphs. I already knew these charts, but thanks for spending the time to paste 'em here. Link to post Share on other sites More sharing options...
rsh Posted August 1, 2008 Share #8 Posted August 1, 2008 My 35 Summicron M vignettes a bit, but I have never given vignetting much thought. I love the 35 Summilux R wide open. Link to post Share on other sites More sharing options...
Mauribix Posted August 1, 2008 Author Share #9 Posted August 1, 2008 Thanks Richard, did you refer to R-summicron only? Unfortunately I was looking for M-summicron's info/comment. Thanks really anyway! Link to post Share on other sites More sharing options...
lars_bergquist Posted August 5, 2008 Share #10 Posted August 5, 2008 All wide angle lenses vignette more than longer focal lengths. There is of course two kinds of vignetting: One 'optical' due to the cosinus-to-the power-of-four effect, which is in principle unavoidable, and the other is 'artificial vignetting' due to the shading effect of the largely cylindrical lens mount; this vignetting decreases with stopping down. You can easily check this by looking through a dismounted lens at different angles, wide open and stopped down. This is why in the diagrams, vignetting decreases with smaller apertures. I own two 35mm M lenses, one v. IV Summicron, and one Summilux ASPH. None of them vignette enough on film to be bothersome. With an M8, the outer areas of the image circle, with the most vignetting, just aren't there. And with lens recognition 'on', what there is, is computed away. The funny thing is that while I had the Summilux coded, the Summicron is not. I keep lens recognition 'on with UV/IR' in both cases. Both deliver perfect results! The old man from the Age of Standard Lenses Link to post Share on other sites More sharing options...
cbretteville Posted August 5, 2008 Share #11 Posted August 5, 2008 Puts lists the vignetting of the 35/2 IV at 2.5 stops and the 35/2 ASPH at 1.8 stops. These are naturally full frame numbers and will be lower on the M8's 1.33 sensor. - Carl Link to post Share on other sites More sharing options...
wizard Posted August 5, 2008 Share #12 Posted August 5, 2008 Puts lists the vignetting of the 35/2 IV at 2.5 stops and the 35/2 ASPH at 1.8 stops. And that's one point where I don't concur with Erwin's findings. In my own experience, the 35/2 ASPH vignettes visibly more on slide film than the 35/2 IV. Have tried sveral samples, they all behaved the same. You probably won't notice this on prints made from negatives, but it is visible on slides. Andy Link to post Share on other sites More sharing options...
Mauribix Posted August 5, 2008 Author Share #13 Posted August 5, 2008 And that's one point where I don't concur with Erwin's findings. In my own experience, the 35/2 ASPH vignettes visibly more on slide film than the 35/2 IV. Have tried sveral samples, they all behaved the same. You probably won't notice this on prints made from negatives, but it is visible on slides. Andy This is interesting... I supposed the same Link to post Share on other sites More sharing options...
cbretteville Posted August 5, 2008 Share #14 Posted August 5, 2008 And that's one point where I don't concur with Erwin's findings. In my own experience, the 35/2 ASPH vignettes visibly more on slide film than the 35/2 IV. Have tried sveral samples, they all behaved the same. You probably won't notice this on prints made from negatives, but it is visible on slides. That is interesting. I've got a IV, but not an ASPH so I can't compare directly. I do however seem to remember shots on negatives where the vignetting from the IV is noticeable when used wide open. - Carl Link to post Share on other sites More sharing options...
wizard Posted August 5, 2008 Share #15 Posted August 5, 2008 I do however seem to remember shots on negatives where the vignetting from the IV is noticeable when used wide open. Carl, you are correct. Wide open, both lenses exhibit the usual vignetting. The 35 asph, however, still shows noticeable vignetting (and more so than the 35 IV) when stopped down to 5.6 or even 8. Regards, Andreas Link to post Share on other sites More sharing options...
andybarton Posted August 5, 2008 Share #16 Posted August 5, 2008 There are examples on this forum of 35 ASPH vignetting, if someone wants to do a search. Mine doesn't worry me on my M7 Link to post Share on other sites More sharing options...
Photoskeptic Posted August 5, 2008 Share #17 Posted August 5, 2008 While I normally use the 35 Cron ASPH on my M8, I tried it on my M3 the other day. No vignetting. Have never had any on the M8. Link to post Share on other sites More sharing options...
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