Quote:
Originally Posted by dmurton
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For example, I was shooting the sun in H alpha, theoretically there should be little or no data in the green and blue channels. Red was not overexposed (was going for surface detail, not proms), there was a surprising amount of data in the green and blue channels. I'm thinking that with too much sensitivity in red, it might bleed over in to the other channels, washing out that data, meaning shorter exposures to compensate?
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Interestingly, I was just reading a site yesterday where someone had the exact same problem but with a Nikon. He bought a vanilla 60D and problem solvered. Perhaps you are right and it is an overexposure issue?
Anyway, have a read here and see what you think...
http://www.astro-nut.com/ir-mod.html