Quote:
Originally Posted by Placidus
(In principle this truly wonderful beast would just exactly precisely NOT fit in my scope. I'd have to do a 4x4 mosaic.)
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It fits perfectly in my FOV. If only I had a permanent observatory so I could image between the summer storms and clouds...
Quote:
Originally Posted by Andy01
Not sure about the law of diminishing returns as far as amount of data gathered vs. noise goes with this
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Just considering shot noise, SNR improves with the square root of the total exposure time. If you have 4 hours and add another 4 then the SNR improves by approx 1.4 times. You doubled the time so the improvement is sqrt(2). If you added 12 hours to your 4 hours then the improvement would be 2 times. Just add 396 hours and your SNR will be 10 times better
Unfortunately, with narrowband you're almost certainly not shot noise limited so the improvement will be less than I suggest above.
Cheers,
Rick.