Quote:
Originally Posted by Doug Pardee
The problem of red noise in blue skies is fundamental to Bayer sensors (which effectively means anything other than Sigma DSLRs). Each individual sensor site is particularly sensitive to one primary color, and the camera uses a "demosaicing" process to detemine the color for each output pixel. ......
[*]Use a good noise-reduction tool, select the blue sky, and reduce the noise in the sky. Go easy on this. You'll never remove all of the noise. You just want to remove enough noise to get good prints (or whatever your output medium is).[/LIST]
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yep, ta, some speckles were even redish
the daylight skys here tend to be naturally very blue/azure blue anyway, and yeah for this ISO and with this digital defect
giving the polarizer a miss sounds worth it, and the speckle seem more noticeable in the prints when the blue sky was deeper too, so ta (my Canon also give rich colour saturation normally anyway so yeah).
no idea how to do noise reduction but, or noise reduction for this particular type of noise
- any tips on practical steps to use in Photoshop CS please? [Gonna try and get CS4, but dont have it yet]