Magenta edge tinging at high ISO and a possible solution...

Started Aug 17, 2009 | Discussions thread
Selfdestructo Forum Member • Posts: 53
Re: PROGRESS: Haven't forgetten you...

great work!

Upgraded from K10d -> K20d yesterday, and noticed this magenta cast effect in short exposures

I don't know how much 'statistical' material these masked borders in the raw files give in terms of being able to give an approximately correct amount of correction of the whole image, but it sure looks promising.

I notice for my camera that for exposure times from 1.3s down to lets say 1/400s, the amount of magenta noise at 6400 seems fairly constant in magnitude with the lens cap on, so wouldn't it be possible to develop a noise profile for each camera by averaging several dark frames from said camera and subtracting that?

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