Quote:
Originally Posted by Alchemy
I have had a look at both the color and this the BW version, on a personal preference this is the one I like, the subtle detail in the Ha stands out so nicely, looking at them side by side, whilst the color is pretty, that superb finesse of detail somehow just doesn't appear so obvious.
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Quote:
Originally Posted by Slawomir
Great image Greg, love the detail and sharpness 
I thought 2-minute subs were sufficient with this nebula, but from your photo I see I need to go for longer subs: http://www.astrobin.com/full/148715/C/ |
Thanks Slawomir.
I think it depends on the CCD used. The KAF16803 has over 100,000 electron well capacity as opposed to the Sony ICX814 which has about 12,000. So you'd have to monitor the brightnesses. Take an image and check the ADU numbers as you move the cursor over bright parts of the image. You start seeing a lot of 65,535 that means you are overexposing.
There's no set exposure length but individual best exposure for that particular CCD being used.
Greg.