This one was difficult to bring out the nebula since the UHC-S filter blocks some of the blue that this object predominantly shines in. But, it captures enough of the OIII, Hydrogen Alpha and Beta light to produce an image even from the heavily light-polluted location that I’ve been imaging from.
I was surprised how well this came out with only about an hour of data. I was after galaxies this night and I only took this to kill time. Even the 33 minutes worth I posted initially looked half-decent. I will have to devote a session to this one and possibly use the L-eNhance filter instead of the UHC-S.
3 hours of exposure for this object. I used SharpCap 3.2 LiveStacking and a Baader UHC-S filter to cut through the light pollution in a Bortle 8 Red Zone metro area.
M51 on Jan 25, 2020. 280 x 30 sec, Gain 42, Offset 15, -20C, UHC-S filter, QHY183c, TV-85 at F/5.6.