To me it looks like a bug in Capture One. It appears that there is no red color cast of shadow in RawDigger, and there are no higher values of the red channel reported. Then I looked into the darkframe files with RawDigger:
There is no red color cast in the shadow at all. Here is a real world picture I made with the IQ250: Note that this is not a lens color cast issue, because LCC has been applied and the 2 minute exposure does not suffer from this red shadow problem.Īfter I looked into these examples, I recalled that when I first tested the IQ3 100MP about 6 months ago I did notice that the darkframe of the 20 minute long exposure looked red.įor comparison, the IQ250 does not have this issue at all. IQ3 100MP + Rodenstock 23mm HR-S, 2 minutes vs 7 minutes: Adjusting white balance does not fix the red color cast in shadow. Note that it's not a white balance problem. IQ3 100MP + Rodenstock 50mm HR-W, 32 minutes: If darkframe noise reduction is disabled with "Aerial Mode", the IQ3 100MP gradually fills up shadow with red color cast if the exposure time is over 2 minutes. I haven't received my IQ3 100MP yet due to the earthquake, but a friend of mine found a problem with it:
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