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.
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Only darks and bias
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darks bias flats
My guess would be that, since it only happens when using the hyperstar, something is not going right while taking the flats. There must be some difference between the time you take the lights and the flats, apparently the vignetting is stronger when taking a flat frame. Very tricky to pinpoint what it is exactly without hardware access.
I've taken my flats the same way since I got the HS and it has only become an issue recently. I can't imaging why it's all of a sudden not workingÂ
Strange, no difference at all in the way you take the flats either? Did you use different bias frames or a different APP version (not that that would be the cause, bu just probing where there are differences 🙂 ).
Try doing your flats by imaging clear sky - before your imaging session. I'm not sure about hyper star but I saw once that putting a t-shirt at the end of the dew shield yielded bad results. I put the t-shirt right at the front of the telescope but the last time I did my flats I used the clear sky approach . Also, image train changes may result in bad images because of thinks like stray light. Did you change any image train components?
