Quote:
Originally Posted by CometGuy
Mike,
I converted your full size image to grey-scale, saved it as a fits file and ran it through Astrometrica. According to it you are detecting stars to mag 20.5 V, not bad for a 6" scope!
Terry
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How did you correct for non-linear scaling? The posted data is only 8 bit/channel .jpg You *need* a calibrated 16bit (data) frame to make a determination such as this.