funny to find two different approaches in light polluted environment: 1) Roger Clark use short exposure times that is 1/4 to 1/3 histogram, and use more subs: Once one reaches a sky histogram of 1/4 to 1/3 histogram on the camera LCD, exposure time is long enough and longer exposures will not improve given a total exposure time. Simply saying sub exposures are not long enough without knowing other parameters is insufficient and could actually be detrimental. Exposing longer so that the sky histogram peak rises above the 1/2 level would decrease dynamic range, saturate more stars and bright areas losing color. For example, below is an image that goes at least as faint as your image, yet is ONLY 1-minute subs and only 9-minutes total exposure time. In another thread you said you do longer than one hour total exposure time and chided me for not going as long. How long is your exposure time? (Note too you have very little h-alpha and lost a lot of red). Exposure is collec...