Quote:
Originally Posted by skwinty
1 The signal to noise ratio for a number of summed images is equal to the sqare root of the number of images multiplied by the mean photon flux.
Regards
Steve  |
But, there's the rub, the mean flux can vary enormously.
With a bright lunar image the S/N is so high as to make the amplitude of the stacked signal + noise almost 1:1 compared to an exposure equal to the total stack time....
All a bit moot really.
Take lots of frames.
Make sure they have more than just noise.