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Image artifact
Hi,
Before wasting another night, I am looking for some advice regarding the artifacts in the images I took last night. Attached is a stack of about 2h of 120s exposures which shows it quite nicely in the top right corner.
Equipment:
RC8 + CCDT67 (1200mm focal length), luminance filter, Telecope Express OAG TSOAG9, self-made camera similar to QHY8.
The artifacts are (barely) visible in all images and flats. While CCDT67 is a new addition to the imaging train, I can't imagine how it would be causing this effect. I am suspicious of light reflecting from OAG but I don't think I can move the prism out much more. See the attached image 2.
Ignoring the dust collection and bad flats, any hints?
Thanks in advance,
Luka
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