This is the result of the First Light session with my new RC12 https://www.astrobin.com/r1jjrs/
On the Original you see the picture without flats applied
Rev. B is the same picture with flats applied
Rev. C Is the master flat and its curve to create the flats I use a flat panel. I use this for a long time without problems with my APO’s(monochrome and OSC)
The Flat is created from 15 subs with about ADU 32.000. For the Subs I used the APT Flat tool but tried also a few different exposure times without any noticeable change. The RC is a from TS Modified RC “astrograph” TSRC12T64 with a 0.8 reducer, suitable for full size sensors. Since this is my first experience with RC Telescopes I don’t know if the Vignetting in the first place is OK / normal. I expected this to be corrected by the Flats but the vignetting on the flats seems to be less than those on the lights.
Does any of you has a solution to this Problem or knows what could be the cause?
On the Original you see the picture without flats applied
Rev. B is the same picture with flats applied
Rev. C Is the master flat and its curve to create the flats I use a flat panel. I use this for a long time without problems with my APO’s(monochrome and OSC)
The Flat is created from 15 subs with about ADU 32.000. For the Subs I used the APT Flat tool but tried also a few different exposure times without any noticeable change. The RC is a from TS Modified RC “astrograph” TSRC12T64 with a 0.8 reducer, suitable for full size sensors. Since this is my first experience with RC Telescopes I don’t know if the Vignetting in the first place is OK / normal. I expected this to be corrected by the Flats but the vignetting on the flats seems to be less than those on the lights.
Does any of you has a solution to this Problem or knows what could be the cause?
. The cause for the over correcting where to old dark's that did not match the flats / Lights.