Using an FSQ 106 with .6x reducer and the ASI 1600 I am shooting 120 sec RGB subs for the rosette. If I try to shoot 120 sec luminance subs, the frame is almost totally white–very bright gray. Obviously, 120 sec is way to long for luminance at my location. I tried 30 sec luminance subs and they look OK. But I am wondering if there is a benefit to using 30 sec lum subs when the RGB are 120 sec. Would more RGB be better?
the general question is, should luminance subs be the same duration as RGB subs to realize the full benefit of luminance in an image.
the general question is, should luminance subs be the same duration as RGB subs to realize the full benefit of luminance in an image.