UPDATE FROM MABULA
I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred  after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.
Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.
APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46. Â Before I release it, I will make sure that everything is working properly and then I will release it.
Hi,
Recently I have tested my Canon 6da fullframe DLSR on a TS 150mm F/2.8 Hyperstar scope, and I took the usual calibration frames. For better understanding, I have shared these together with one light frame here: https://drive.google.com/open?id=1N1P6j8AFUX3W7WPxWGnTfMwjMe3sBOH7
It looks like applying flats has almost no effect on the vignetting in the final image, it looks like this:
When I try to use the light pollution removal tool, it gets even worse:
Could you please shed a light what am I doing wrong here ? As far as I see I followed the usual guidelines to make the calibration frames,
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Clear skies,
Janos
This could be light pollution which isn't coming from a sky gradient. So that would potentially be, internal reflections caused by a light somewhere near.. it's hard to pinpoint.
Thanks Vincent, that is very plausible under my Bortle 7 skies... I think I will stay at narrowband imaging, then I have hopefully no such effect,
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CS,
Janos
That might be the cause indeed, are there any lights shining directly into the direction of your setup? Even from rather far away?
I don't have lights nearby the setup and I have a 25 cm long dew shield in front of the telescope, that prevents normally any stray light. What I suspect is that the sky background is too bright, even with light pollution filter. My scope is a TS 150mm f/2.8 Hypergraph, so very quick for these circumstances.
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Oehh right, those kind of setups are indeed very sensitive for light reflections. Still I would say this looks like there is some kind of internal reflection going on, maybe it's a good idea to double-check the setup for specifically this? Could also be that internal parts are a bit too reflective.
I know this is an old thread but I recently tried taking Flats with a SW 150PDS in my darkened garage and had weird light patches in my flats. Seems the back end (mirror end) of my scope and I suspect any reflector, leaks stray light like a sieve and you don't need much. So now I either do flats at night in the garage or wrap both ends of the scope in a blackout material or similar. I saw an immediate loss of stray light artifacts ensured.Â
Chris
I know this is an old thread but I recently tried taking Flats with a SW 150PDS in my darkened garage and had weird light patches in my flats. Seems the back end (mirror end) of my scope and I suspect any reflector, leaks stray light like a sieve and you don't need much. So now I either do flats at night in the garage or wrap both ends of the scope in a blackout material or similar. I saw an immediate loss of tray light artifacts ensured.Â
Chris
Thanks Chris, I will try that as well. Until now I was not able to take proper flats with my imaging train,
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CS,
Janos
