Quote:
Originally Posted by Shiraz
No need to apologise. I doubt that we are going to agree, even with M&Ts clear results. Your better results at 30 minutes are easily explained - your camera has relatively high read noise. You would not have detected more photons in total using 30 minute subs cf 10 minute subs, but you would have generated much less total read noise when combining the longer subs.
I cant' think of any "noise from outside the camera" - once the signal is digitised, that's it.
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Given the fact I routinely image through a glowing atmosphere, I can assure you the sky emits flux, and it is a noise source ...not sure why you are ignoring this.
