21mm Super Elmar 3.4 magenta corners?

[thrang]

Advertisement (gone after registration)

Just got a 21mm Super Elmar 3.4 delivered from B&H... blisteringly sharp lens (shooting on M11), but I may have a defective one... I am seeing a magenta cast in the corners of images that I don't see with my Summicron 2.0 35 or 50 on the same body....

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!

While also darker in the left corner, this is I think more to do with the sun setting on the far right of the image orientation....

Has anyone seen this on this lens, or for that matter, any other Leica? I'm presuming at this point it has an issue

Thanks

 

Edited June 14, 2023 by thrang
added content

[Advertisement]

The Leica Q3 is available for pre-order at B&H Photo Video and Adorama

[rramesh]

Strange. Is the camera detecting the 6-bit code? 

[thrang]

40 minutes ago, rramesh said:

Strange. Is the camera detecting the 6-bit code? 

Well, the Fotos app shows the metadata, and the camera is set to Auto for lens detection, so I presume yes (I am completely new to Leica and have had the M11 for less than a week…)

[romanus53]

nothing wrong with the lens, just normal behaviour of the sensor due to the close rear-lens and despite the micro-lenses on the sensor surface. just create and apply a color-cast correcting profile in post processing and it will be fixed. 

[lct]

Deja vu with various lenses on various digital cameras when shooting blue skies. You may wish to oversaturate magentas in PP (100% below), for the sake of testing, and you won't see more magenta cast in the corners than elsewhere i suspect. My usual solution is don't correct reds or magentas but under-saturate and/or enlighten blues instead. Just a bit suffices generally.

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!

[Ken Abrahams]

I have never had this purple fringing/cast with my copy of the SEM. I did have some issues ten years ago with images showing purple cast however that was sorted out when I read about colour profiles and set up my preferences in PS and Lightroom.  

[thrang]

Advertisement (gone after registration)

Thanks all- if anyone has a good resource for color correcting profile in Lightroom let me know , else no worries I will Google around…

[lct]

Neither the camera nor the lens are prone to color shifts. Not sure what LR can do then but i have little experience with it. Blue lightness +30 below.

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!

 

 

[thrang]

13 hours ago, romanus53 said:

nothing wrong with the lens, just normal behaviour of the sensor due to the close rear-lens and despite the micro-lenses on the sensor surface. just create and apply a color-cast correcting profile in post processing and it will be fixed. 

I am learning something here- is this with certain lenses only (ie this 21mm), in that their design puts the rear lens closer to the sensors than others?  I do not see this with the Summicron asph 2.0 35 or 50 on the same body.

Thanks

Edited June 14, 2023 by thrang

[lct]

It is not a problem on the M11. Even more critical lenses like Biogon 21/4.5 or Super-Angulon 21/3.4 work fine on this camera. 

[Xavier]

I have never had any such thing with my copy of the SEM, but I used it only on an M9 and SL2-s, so maybe the M11 has a more demanding sensor that would explain. Still, I would not expect this.

As suggested above, I would suspect something wrong with either the applied lens profile or the processing.

Edited June 14, 2023 by Xavier

[Kiran]

This is not uncommon, most likely you will see a green cast on the opposite corner. 
It is unfortunately caused by the close proximity of the sensor to the lens and the acute angle of light hitting the corners.  
Capture One has a very easy tool called LCC that will, when setup correctly remove the colour casts and the vignette perfectly. 

[lct]

23 minutes ago, Kiran said:

This is not uncommon, most likely you will see a green cast on the opposite corner. 
It is unfortunately caused by the close proximity of the sensor to the lens and the acute angle of light hitting the corners.  [...]

BSI sensors like that of the M11 have not this problem. Suffice it to avoid over-saturated blues like in the snap below (M11 + SEM 21/3.4 asph @ f/8).

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 June 14, 2023 by lct

[thrang]

 

So i did a few more shots today, and other then setting white balance in Lightroom and reducing saturation a touch (not for the magenta issue but because Dehaze resulted in too much saturation), it not really prevelant…odd

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!

 

It’s there, but not as strong…

Edited June 14, 2023 by thrang

[pgk]

See: 

which is the same lens on the M9. I would expect the M11 to be at least as good. I just wonder if sometimes subject matter might exasperbate the lens's characteristics. I would also suggest that when you fit the lens make sure that the camera recognises it correctly and check the exif data in your raw converter to make sure that your image processing software is reading the exif data correctly.

[Kwesi]

On 6/13/2023 at 8:09 PM, thrang said:

Just got a 21mm Super Elmar 3.4 delivered from B&H... blisteringly sharp lens (shooting on M11), but I may have a defective one... I am seeing a magenta cast in the corners of images that I don't see with my Summicron 2.0 35 or 50 on the same body....

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!

While also darker in the left corner, this is I think more to do with the sun setting on the far right of the image orientation....

Has anyone seen this on this lens, or for that matter, any other Leica? I'm presuming at this point it has an issue

Thanks

 

This is not normal behavior for this lens on the M11.

Either there is a problem with the M11 or the lens.

Best thing to do is find a local dealer or person with both an M11 and SEM and test their equipment against yours - ie put their lens on your camera/shoot your lens with their camera.

there is absolutely no need for you to figure out how to fix this in post processing.

If its the lens send it back to BH if its the camera, have Leica take care of it.

[thrang]

1 minute ago, Kwesi said:

This is not normal behavior for this lens on the M11.

Either there is a problem with the M11 or the lens.

Best thing to do is find a local dealer or person with both an M11 and SEM and test their equipment against yours - ie put their lens on your camera/shoot your lens with their camera.

there is absolutely no need for you to figure out how to fix this in post processing.

If its the lens send it back to BH if its the camera, have Leica take care of it.

Yes, I got an RMA from BH and ordered another one so lets see.... I don't see it with the 35 and 50 mm summicron 2.0's

[Kwesi]

hopefully its the lens.

My gut feeling is that the M11 for whatever reason, is not applying the correction although its reading the code.

one way to test is by fooling the camera into thinking that the lens is uncoded and then applying the 21/2.8 correction and seeing if that gives a better result.

take a piece of white paper and lay it over the code reader before you mount the lens. my guess is that'll be enough to trick the M11 into thinking its an uncoded lens

[Advertisement]

Hallo,

Look here: Leica M

[thrang]

Just now, Kwesi said:

hopefully its the lens.

My gut feeling is that the M11 for whatever reason, is not applying the correction although its reading the code.

one way to test is by fooling the camera into thinking that the lens is uncoded and then applying the 21/2.8 correction and seeing if that gives a better result.

take a piece of white paper and lay it over the code reader before you mount the lens. my guess is that'll be enough to trick the M11 into thinking its an uncoded lens

Thanks I will try this

[lct]

1 hour ago, thrang said:

Yes, I got an RMA from BH and ordered another one so lets see.... I don't see it with the 35 and 50 mm summicron 2.0's

Can happen with Summicrons and other cameras too. Do a search on the forum i seem to recall a discussion we had (last year perhaps?) about that. 

Edit: Just found the links below:

 

Edited June 15, 2023 by lct