Quote:
Originally Posted by Doug
Aha!! Thank you Gerald! A bit of light begins to dawn. A lot of people use Images Plus, whereas I do not. If Images Plus converts the flat fields to Gray-scale, that would explain why nobody is plagued with colour variability from Flat series to Flat series. MaxDslr does not do this as far as I can understand Canadian English. Leaving the Flat Field frame with the colour encoding will make the calibrated image influenced by the colour balance of the Flat. Now I begin to understand why people are having trouble understanding where I'm coming from here.
I have tried to grey scale a flat, but found that the process reduces the effectiveness of the flattening. I will need to re expose some flats at a higher density, so that after grayscaling they will have a 30%-50% intensity.
Nevertheless, I think the ideal will be to get a light source that will give a fairly constant colour temperature or spend money on Images plus....I think a steady lightsource will be cheaper. I agree with your comments on rotating camera only.
cheers,
Doug
Paul I will try to reply to you tomorrownight
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I suppose I should have said I have been using ImagesPlus for quite some years now for all my DSLR work.
Just to be clear, I do not rotate the camera or advocate rotating the camera when taking Flats.
Cheers