i took this the same night i took M15, but this time i used 10 second subs. 280 frames per LRGB filter, and ended up throwing away over half of them in pixinsight subframe selector filtering for FWHM and eccentricity. it ended up being about a 90 minutes of integration.
i used darks and bias frames. i did a quick test w/ using just darks and a test with just bias, and it seemed to slightly better using both bias and darks in this instance.
this is the first time i've really used a cmos, and it's nice not having to worry about dead columns. (is that a function of cmos? or maybe this is just a new chip..)
i think i might have taken too much green out of it. i dunno - processing is hard. i think this object looks better cropped, so this is a crop.
always looking for feedback on improvement, comments/criticisms are always welcome.