I ran 50 flats last night with each filter (LRGB); 5 sec exposures; and all were consistent with the Lum filter; but may were blown out in each RGB series. Does anyone have an explanation for this?
I ended up deleting the overexposed ones before processing in Nebulosity.
Camera: ZWO ASI1600MM cooled; L (1x1); RGB (2x2); High Dynamic setting (Gain 0) and 5 sec exposures.
Thanks!
You can’t use the same exposure per filter and expect them to have the same ADU. For instance, with my flip flat, I take 5 second exposures at R and only 1 second exposures at blue.
Use the calibration wizard to ensure you’re getting the right exposures.
Thanks Mads,
I think I must be doing something inherently wrong in my workflow:
I tried the Flat Calibration Wizard and it took a bit of time to get all the filters to get calibrated.
At my lowest light setting and lowest Gain, I set the Minimum exposure to 0.5 sec and max of 10 sec.
The calibration wizard can save the settings to a Profile or to a Sequence.
In either case, the exposure times are auto-filled and were all lower than 5 seconds.
With the ZWO ASI1600MM cooled, anything less than 5 seconds results in horizontal banding.
Any suggestions how to fix my workflow and the banding would be much appreciated!
You have to dim your light source. You can use a shirt, sheets of paper…
I will add 1-2 sheets of paper on top of my Spike-A-Fielder since it’s already at the lowest setting.
Thanks for your suggestion!
David
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