Quote:
Originally Posted by richam
Mark, do you have any references on this? Do you get cyan or magenta vignetting by using an IR cut filter on an M camera loaded with color film?
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If you look at the UV/IR filters it is obvious where the cyan vignetting is coming from. At normal incidence the filter has no obvious 'color' and at glancing angles it shows a red/pink reflection so what remains on transmission is cyan. This is visible in the image corners below 35mm focal length. Film or sensor makes no difference except that on film the vignetting will be more severe as you are using the full angle of acceptance of the lens.