Quote:
Originally Posted by Shiraz
Hi Tony. That is pretty darn good optically - good fine detail. The CCD is operating right down in the weeds though - the SNR is very low in all channels and the colour balance seems to have suffered.
You asked, so a few things you might consider are (in combination maybe): - try using flats and/or darks to reduce the fixed pattern noise (I once had the same problem with a QHY5C and flats helped a lot) - try longer exposure times to get more signal in each frame and make sure to record the video for at least 6 minutes to get the best possible SNR on stacking - maybe try a bit shorter focal length to increase the photon density on the chip (8m+ is possibly asking a bit too much of an 8inch/webcam combo on a dim object like Saturn).
Hopefully someone with Toucam experience will chip in here re settings, compression etc. All the best, Ray
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Thanks Ray. I will try a few of those things you mentioned the next time I have a chance to do some imaging. I realise that I'm pushing the setup I have but only one thought comes to me at this time: Need... More... Aperture... Need... More... (insert drool here).
Quote:
Originally Posted by coldlegs
Tony
I get that when the gain is turned up too high. It's electrical signal noise in the toucam. The only things I can do are drop the gain and turn up the gamma a little and have the brightness near max. Using darks at the same gain and exposure length helps also.
Stephen
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Thanks Stephen, I was using more gain than I was comfortable with, so I will try dropping the frame rate some more, and boost the others as you suggested. I took some darks, but when I processed the avi on the laptop, I was not impressed with the result, but this may have more to the do with the laptop display than anything else... Must remember to try again.