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Bmorena

To modify a 40 summicron

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These are shot with APS-C sized sensor

that means that the corners I'm talking about on a Leica M8 are cropped off, there is a rather large difference between a 1.5 and 1,3 crop.

 

BTW I asked for upper left corner, but I would guess it's OK on the R1ds,,,, The picture is rather difficult to judge at 50%

Edited by Erik Gunst Lund

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Never noticed any problem in 20+ years with my film Ms or when i tested the M8 a couple of years ago but i'm no pixel peeper so i may have missed something i don't know. What you say surprises me though given that R-D1s microlenses are not as good as M8's. This is obvious with lenses like CV 15 or 21 for instance. I would have thought that the 40/2 is problem free from this standpoint.

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As you like Erik but a good CLA could be usefull don't you think so? I have 3 copies of the 40/2

the more beatens are the best but the mint one would need some CLA as well. FWIW.

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Any haze or separation re the glass definitely needs a CLA not the case here though

Your captures are very sharp, clean and contrasty so you sample(s) must be fine!

 

I do a lot of tinkering with lenses, my good friend Bjørn Rørslett has supplied me with CPU's for MF Nikkors, I have also helped him and many others on NikonGear CPU chipping their lenses.

 

I CPU chipped ny Noct Nikkor and during the process it got rater hazy inside, so a complete rebuild of the glass was needed, even the apperture blades and the ball bearing for the aperture ring

 

Another project was the legendary Voigtlander APO Lanthar 125/2.5 The best SLR macro lens. I got a Canon FD mount version of the lens rather cheap and converted it to Nikon F-mount, ie reversing the aperture lever action and adjusting the movement to worg as a G-Type Nikkor lens.

 

Sorry for the rambling:rolleyes:

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Any (wideangle) (older) lens has quality falloff towards the corners. So has the Summicron 40. Actually it is exceedingly good given that it was built as an el-cheapo lens (relatively) sold as a kit with an entry-level camera.

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Did you use one on your M9? Any pic with it? I would like to see how it renders re: vignetting compared to 35mm lenses.

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AccessDeniedRequest has expiredB20C568AE75CBE072011-02-19T23:57:42ZuvmNsg5DI41i0uHPWdFZK8YzCaIdlWFVHHLjEtLH7jBREftngDJV1ljmIpyzUv/S2011-02-20T09:35:52Z

 

Seems to be down?

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Did you use one on your M9? Any pic with it? I would like to see how it renders re: vignetting compared to 35mm lenses.
I'll upload some. For carrying around it is my standard lens, except when the summilux 50 asph is called for. I'm going to sell a couple of 35 mm lenses.

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I think this is a nice one to judge vignetting from

No corrections, a straight conversion. This is at 2.0

Edited by jaapv

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Nothing wrong with the resolution either: Btw these are M9 shots.

Edited by jaapv

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Your first pic makes me think of this one as well. 40/2, f/2.8. No sharp corners though. Sorry Erik.

 

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The best coding would be the Summilux 35 pre-sph, but there is no coding for that one, just a menu selection. I coded it as a Summicron 35 (old) which comes very close to the optimum. The vignetting is considerably better than on film that way. No problems in the corners at all on the M9

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