(Click to enlarge) IC1805/IC1848 Canon 100mm f/2.8 lens (stopped down to around f/3.5ish with step rings) ASI1600MM-Cool, gain=139, offset=21, T=-25C AP Mach1 Had some nasty star elongation - something is tilted is my guess. Since I used a 3D printed bayonet adapter for the Canon lens there is probably lots of room for misalignment/tilt. Next should try stepping down to f/4. In effort to cleanup stars left lots of processing artifacts. Need to go back through more carefully when shaping stars. 100 x 180s (5 hours) | IC1805/IC1848Canon 100mm f/2.8 lens (stopped down to around f/3.5ish with step rings)ASI1600MM-Cool, gain=139, offset=21, T=-25CAP Mach1100 x 180s (5 hours)
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