Can a flat be edited?
Posted: Fri Nov 17, 2023 6:31 pm
I've been experimenting with what we have coined Ultra Fast (UF) EAA and here is the topic on CN.
https://www.cloudynights.com/topic/8928 ... acked-eaa/
What I've experienced so far when taking a flat in SharpCap 4.1 is the outer area of the frame, which is likely black due to the smallish central image, is completely overexposed when applied. I'm using an IMX585 OSC sensor (Uranus-C) and have tried using an ROI of 2180x2180 and the flat when applied looks good in the center and is overexposed everywhere outside the center. I've been using the flat with bias option.
Should I reduce the ROI to cut out more of the vignetted field? Is there a way to edit a flat and get rid of the outer "off'-calibration" area?
https://www.cloudynights.com/topic/8928 ... acked-eaa/
What I've experienced so far when taking a flat in SharpCap 4.1 is the outer area of the frame, which is likely black due to the smallish central image, is completely overexposed when applied. I'm using an IMX585 OSC sensor (Uranus-C) and have tried using an ROI of 2180x2180 and the flat when applied looks good in the center and is overexposed everywhere outside the center. I've been using the flat with bias option.
Should I reduce the ROI to cut out more of the vignetted field? Is there a way to edit a flat and get rid of the outer "off'-calibration" area?