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green cast in M9 with new firmware 1204


pibitller

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Leica M9 firmware 1204 + ELMARIT 28 ASPH generates green color in the corners.

 

Link to DropBox shared with file dng and jpg: https://www.dropbox.com/l/sh/3QyW9rInVPwdfIALc3RyMr

 

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You may want to send this file (or similar) to Leica Germany tech support - it is possible that in (re)writing the corrections for the new sensor glass in FW 1.204, they got those for the 28 EM ASPH wrong.

 

"Green corners" means the firmware is undercorrecting for the tint created by the built-in IR filtering of the cover glass, at shallow angles of incidence. This looks about like what I get (normal M9) with a 35, if the lens detection is turned "OFF." Your camera detected the lens, but failed to remove enough green from the corners.

 

(When the M9 first came out, the corrections for the 21 non-ASPH were far off (red corners - too much correction) for over a year, until Leica issued their 2nd or 3rd firmware rewrite.)

 

In the meantime, you might try setting the lens detection to "Manual - 21mm Elmarit non ASPH", to see if that removes more green, And just for comparison, see what lens corrections OFF looks like.

Edited by adan
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If you use Lightroom, you can use Adobe DNG Flat Field Plugin to correct color casts like this nearly perfectly, and whether or not the camera has a lens profile enabled. See: https://themachineplanet.wordpress.com/2014/04/20/zeiss-c-biogon-t-4521-zm-and-removing-the-reds/

I use a credit-card sized piece of white translucent plastic to shoot reference images for correction. The plugin works best if the reference images are shot in the same light as subject photos that need correction, and with the specific camera/lens to be corrected, then use the "interleaved" option in the plugin. But it works well enough if the light is the same type (daylight, tungsten, LED, etc.). You can correct color casts only, or color cast and light fall off. The plugin only works with DNG format, but almost any camera's proprietary RAW format can be converted to DNG. So it can also correct the rare SLR lens that shows color casts like the Zeiss 18mm/3.5 ZE/ZF lens.

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  • 2 weeks later...

Good morning, if it helps them, I have done some tests with Flat Field Plug-in.

 

Comparing the photos sumicron IV 50 vs elmarit 28 ASPH confirm that the green cast only appears with elmarit.

 

I also confirm that the Flat Field Plug-in solves the problem at this time.

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  • 3 weeks later...
  • 4 weeks later...
  • 2 years later...

Hi,

 

I have a M-E with fw. 1.210, also new sensor since July 2017, and I get the same issue with Elmarit 28mm ASPH. It would be good to know if there are other people with the same issue.

 

Thx

 

I sold the 28 elmarit asph. The 35 summicron asph is fine with the M9 new sensor.

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I sold the 28 elmarit asph. The 35 summicron asph is fine with the M9 new sensor.

What a pity, since the 28 ASPH is such a wonderful lens!

 

Thanks for posting your experience and pointing out this fw flaw. I have M10 & M9 bodies. By coincidence, I have used the 28 ASPH exclusively on the M10 since my M9 returned from sensor replacement. No problems there.

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Hi,

 

What a pity, since the 28 ASPH is such a wonderful lens!

Thanks for posting your experience and pointing out this fw flaw. I have M10 & M9 bodies. By coincidence, I have used the 28 ASPH exclusively on the M10 since my M9 returned from sensor replacement. No problems there.

 

But have you tried it on the M9 since the new sensor has been replaced? I'm trying to figure out if this is my model problem or of it's a common issue with the new sensor. In the meantime I've been comparing pics of the same lens before and after sensor replacement and they are completely different, no green casts on the old sensor. Also tested with a 24mm Elmar and the green cast is there as well as the Elmarit 28mm. No issues on Summicron 35 though.

 

Thanks for your feedback.

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Hi,

 

 

 

But have you tried it on the M9 since the new sensor has been replaced? I'm trying to figure out if this is my model problem or of it's a common issue with the new sensor. In the meantime I've been comparing pics of the same lens before and after sensor replacement and they are completely different, no green casts on the old sensor. Also tested with a 24mm Elmar and the green cast is there as well as the Elmarit 28mm. No issues on Summicron 35 though.

 

Thanks for your feedback.

Unfortunately, due to professional obligations, I will not be able to do some testing in daylight until next weekend. I will report back here.

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I have exact same issue as well. I have sensor replaced M9 and when I set the camera to detect 6 bit code, I get green-cyan corners. 

 

but when I set it to manual detection, and pre asph profile, color of corner gets better, but not I have wrong exif data.

 

Good to know. Right now at least 3 users are reporting the same issue with M9 and the 28mm Elmarit Asph. Some samples below:

 

https://flic.kr/p/2bjpy5z

 

https://flic.kr/p/2bjpyex

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