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Whilst it is a significant blemish and I have now ordered a brand new Chroma luminance filter I did get a chance last night to take a quick sub using the filter and tbh it is amazing that I can't actually see any issues the blemish caused.
I had a litany of problems last night as it is the first time I've set up an imaging rig in 7 years. I had dust off half-remembered polar alignment routines, working with NINA I've never used - took me a while to even see how to get autofocus working and to cap it all PHD2 just kept closing of its own accord so I couldn't guide at all. To cap it all, my new counterweight hasn't arrived yet s the scope is horribly unbalanced in RA.
What I've attached though is not an image per se, just a screen snip of a single luminance frame of 30 seconds. There is very slight trail but in essence I can't see any deleterious manifestation of the blemish.
The first image is cropped but I've also included the uncropped one.
Taken with the ASI6200 full frame camera on the Avalon M-Uno with the blemished 50mm unmounted Chroma Luminance filter.
For good measure I also included the same through the Chroma 3nm h-alpha filter. Tbh the h-alpha one doesn't look quite focused, but I was also having problems with my dew straps which are connected to the Eagle but controlled via the ECCO. What I hadn't realised is you have to calibrate the temp sensors first and I didn't. I reckon the h-alpha image may be through some amount of dew.
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