Xplode

Great. Could you also take a flat and post it as RAW?

I see there is still a bayer pattern in that image with uneven values for the pixels, i wonder how that would be fixed best? I tried to debayer the image and it turns out looking good, but i guess resolution is lost in the debayering process. Is there a way to change the pixels values so they get the correct values so it doesn't have to be debayered? Could DCRAW fix this or do they need to be processed by some new software? 500x500 crop from original image VNG debayered by pixinsight Changed to grayscale (extract luminance seems to give exactly the same result) Could you post the RAW file so i could experiment more?

Guide speed works together with calibration step so 1850ms should work. I did the calculations for your setup at 0.1x speed and calibration step would need to be 9200ms! I guess this is why your earlier settings didn't work. Auto select star should work great, never had a problem with it myself so i suggest you stick to it too. From what i understand hysteresis on DEC should only be used on mounts without backlash...so none of the Skywatcher mounts and most other cheap mounts won't be suitable either.

Firsly you need to check your guide speed. If you use EQMOD with pulseguiding i suggest you set it to 0.5x under "ASCOM pulseguide settings) in eqmod. If you use ST4 you also have an option there to set it to 0.5x. I have tried lower settings, but found calibration to take more time without making guiding more accurate. I calculated your needed calibribration step to 1850ms. I also suggest you change dec algorithm to resist switch. SNR 40-50 seems very high? I usually guide at stars with SNR 7-12