@WayneH wrote:
I tried a Sequence last night to develop filter offsets. LRGB Ha-O3-S2. Set all for 2x2 and a few seconds for LRGB and 90 seconds for Narrowband and 3 repetitions for each filter (alternating between filters each time. I have an f/4.5 5" refractor and set step size to 100, with 3.7 micron pixels camera ASI1600. I was getting a lot of variance within individual filters (100+ microns) and the NB struggled to reach focus. Plus by the time I was halfway through the temp had dropped almost 2 degrees C, so that probably had an impact.
I was thinking it was too ambitious to try to do all the filters at once - maybe the LRGB together at 1x1 and then Narrowband at 4x4 But how would I account for temperature differences? Should I do a Temperature calibration first with the Lim filter and then apply that to the values I get on the offset run? Would appreciate practical advice from those who have gone before.
Wayne
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