Dear Bernd,
Thank you for your detailed analysis. This is extremely helpful for sure. I shot these frames approx 10 days ago and I remember having great difficulty in finding the right exposure time for not saturating the R and B pixels while illuminating the G pixels sufficiently. Still, I suspect I might have saturated R and B channels. I will collect some new data when I go to my observatory in 10-12 days time.
As for the checkerboard pattern I didn't do anything other than calibration. I have uploaded one of the calibrated frames to DB --> https://www.dropbox.com/s/6gu1x1s6srnzasd/m101_30sec_1x1__0006_c_cc_dm.rar?dl=0
The checkerboard is clearly visible in the uncalibrated Lightframe
I can also try shooting with camera's original firmware, without any hacks. But I think, it is generally accepted that Nikon plays with pixel values too.
Lastly, I cleaned the sensor after I completed the test shots. The flats are much cleaner now... should have done it prior to the test shots but I was in a rush to see if the camera would produce any useable data or not.
Thanks again! Much appreciated your help.
Sedat
Thank you for your detailed analysis. This is extremely helpful for sure. I shot these frames approx 10 days ago and I remember having great difficulty in finding the right exposure time for not saturating the R and B pixels while illuminating the G pixels sufficiently. Still, I suspect I might have saturated R and B channels. I will collect some new data when I go to my observatory in 10-12 days time.
As for the checkerboard pattern I didn't do anything other than calibration. I have uploaded one of the calibrated frames to DB --> https://www.dropbox.com/s/6gu1x1s6srnzasd/m101_30sec_1x1__0006_c_cc_dm.rar?dl=0
The checkerboard is clearly visible in the uncalibrated Lightframe
I can also try shooting with camera's original firmware, without any hacks. But I think, it is generally accepted that Nikon plays with pixel values too.
Lastly, I cleaned the sensor after I completed the test shots. The flats are much cleaner now... should have done it prior to the test shots but I was in a rush to see if the camera would produce any useable data or not.
Thanks again! Much appreciated your help.
Sedat