Hot pixels - ASI 533MC Pro

sitt

I have a ASI533MC Pro which I believe is generating lots of 'hot pixels' could someone from ZWO confirm if I have an issue please? Using Gain of 101.
I have uploaded a fits file to my dropbox https://www.dropbox.com/s/io0tp22iiv2fzx2/2021-01-29_21-06-01_-10.10_300.00s_0000_0.64.fits?dl=0

Tech@ZWO

Hello
please dither

BPyL

Hello. Can you tell me what devices / software are you using for focus the shoot?
Thanks in advance.

sitt

I do dither after every shot, dithering is not my issue. If you zoom in on the file to around 130% you can clearly see the hot pixels
Using NINA with a Primeluce Sesto Senso 2 focuser

Tech@ZWO

Please calibrate with dark frames. If issue persists, please try on ASIStudio and provide the fits file.

sitt

Yes, I do use calibration frames but look at the amount of hot pixels there is in the attached fits file. Shouldn't be that many hot pixels...

Tech@ZWO

sitt
Please try this:
https://drive.google.com/file/d/1KoskQQLSqkBNOLfgsJCi3UYGZSPPavgc/view?usp=sharing

sitt

What would you like me to do with those files?

Tech@ZWO

sitt
We just updated ASCOM driver, please try this which should fix hot pixel:
https://drive.google.com/drive/folders/1z8Ae5xVNZGj8feDHfWaLnRbtg72biv3Q?usp=sharing

Nedi21

@Tech@ZWO#44178 Is this updated to the Asiair plus, or how do you use this with asiair plus. I feel my 533MC also produces quite a lot of hot pixels, but will try dithering and calibration frames in the future too. Just checking if there is drivers etc that are up to date thats a good to know 🙂

Tech@ZWO

Nedi21 Hi Nedi,
This problem has been fixed a long time ago, you can update to the lastest version ASIAIR app to test.