Hello friends of Cloudnights!
This is yet-another-question about my camera weird behaviour. The camera is a mono SBIG STF 8300, I bought it second hand a couple of months ago.
Now the problem: there is a sort of spike (or blooming? not sure) on the brightest stars in my frames and I'd like to understand from where does it come and how to get rid of i. I don't want to be forced to remove it by hand with clonestamp-like tools.
Here one example
(bin 1, G filter, 300s exposure)
This is another example:
(4 seconds bin 1, L filter)
Please note, same strange spike in two very different telescopes: a small apo (WO Star71) and a 8" f4 newton (skywatcher wide photo). Images were taken on two different nights.
One thing worth noting is that it seems to affect only G and L filters, there are no traces of it in frames taken on the same subject with B and R filter (B and R frames were taken in a different night and the histogram peak is slightly higher for G filter, nothing really relevant I would say, 2500 ADU in R and B vs 2700ADU in G)