Magenta Vignette with M8 and 15mm CV

[photolandscape]

I made a few photos of a street scene last week, using my M8, and the CV15 with its Milich adapters (the M-mount, and the IR filter holder/shade). I have gotten pretty tired of the usual cyan fringing even when using the Milich adapter, and since there there weren't any black objects in front of me that I felt would exhibit the usual IR problems, I decided I'd take the filter off and hopefully avoid cyan vignette issues in the corners.

So without the IR filter and holder/shade, the shots show a weird magenta cast that becomes more pronounced as you move outward toward the corners of the images--just like the cyan vignette issue, but magenta instead.

I am totally perplexed by this. Can anyone think of a solution? Could it be an issue with the camera not reading the coding on the Milich M-mount? I'm puzzled.

[sandymc]

IR filter setting in the menu enabled, but no IR filter??????

Sandy

[ArtZ]

Steve,

Could you post these images?
.

[scott kirkpatrick]

To spell out Sandy's question, it sounds as if you left the camera in the Lens Detection Enabled-UV/IR filter setting, in which it will automatically correct for a cyan drift that is much stronger than the little that results from the thin green filter over the sensor. The result is pink corners. Instead, set either Lens Detection ON (slight cyan correction, fairly strong luminance vignetting correction) or OFF (no corrections at all, but also no EXIF info about what lens you used).

scott

[mmk60]

I have never had any serious problems with the CV15..... No IR cut filter but the lens detection is ON.

cheers

[BerndReini]

You have to set the lens detection turning off +UV/IR.