Noobie here, have had a long interest in astronomy but only recently getting into astrophotography.
Picked up a QHY5III 178 mono camera recently and took some test solar sequences at full resolution, was surprised to see a faint grid pattern superimposed (histo stretched to highlight this). This occurs whether I use FireCapture (gain 5, 2 ms exposure) or SharpCap (gain 1, 2 ms exposure, offset 10), which to my understanding use different drivers; grid is present whether I use 8 or 16 bit processing.
Both programs seem to recognize it as a mono camera. I am using the 170223 QHY5III drivers and the 18.104.22.168 NativeWDM drivers; there are no other filters in the optical path. If it makes any difference, the sequences were through a Lunt LS50THa, although I can see the pattern even just waving the camera around the room not attached to a telescope or other lens. Sorry about the smudge on the lens.
I didn't see this with the QHY5L-II. I borrowed a QHY5III 174 mono and didn't immediately see this with some quick tests, I'll try to grab some sequences tomorrow to verify.
Has anyone else experienced this? It's completely possible that I'm doing something outstandingly dumb somewhere.
Thanks for any help you can provide!