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Lots of Hot pixel

Omegon veTEC 571 C Hot Pixels Troubleshooting Help Needed
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Haakon Rasmussen avatar
Haakon Rasmussen avatar
Hallo,

i think there is a increased number of hot pixels being produced by my camera. I hope someone could tell me if this amount of hot pixels is normal. I used NINAs internal driver in high conversion gain, gain 100 cooled down to -5 degrees Celsius. My feeling is telling me that the numbers are steadily increasing. I also think my Raws are very noisy.
I would appreciate any input. I hope the JPEG file is good enough to show  the  problematic pixels.

CS Haakon
andrea tasselli avatar
andrea tasselli avatar
Compare the 3 standard deviations of an old master dark with a very recent one and you'll see whether the hot pixels are increasing or not and how much if that is the case.
Haakon Rasmussen avatar
Haakon Rasmussen avatar
Ok. Can i use the statistic tool from Siril for this purpose?
andrea tasselli avatar
andrea tasselli avatar
I suppose you can.
Oskari Nikkinen avatar
Oskari Nikkinen avatar
I have a RisingCam IMX571 made by ToupTek, as is your Omegon model. Have seen a steady but not concerning rise in hot pixels since 2021 (or 2022, not sure actually). I think i have around 1.5% currently, up by less than 0.5% since new.

If you have a massive spike in hot pixels you might have some cause for concern, if just slightly more than a few years back then no problem.
Helpful Concise Supportive
Read noise Astrophotography avatar
Read noise Astrophotography avatar

Haakon Rasmussen · Jul 19, 2025, 01:37 PM

Hallo,

i think there is a increased number of hot pixels being produced by my camera. I hope someone could tell me if this amount of hot pixels is normal. I used NINAs internal driver in high conversion gain, gain 100 cooled down to -5 degrees Celsius. My feeling is telling me that the numbers are steadily increasing. I also think my Raws are very noisy.
I would appreciate any input. I hope the JPEG file is good enough to show  the  problematic pixels.

CS Haakon

I have the ToupTek ART 26000M same cam I guess…

-5c isnt enough to eliminate hot pixels I run mine at -20c with 5 min cooling down time and 5 min warming to avoid thermal shock of the sensor.

This noise might be:
Too warm try cooler but keep pelter power max 75% when idle because it will rise under long exposure.

Noisy USB lane , try camera only

Electromagnetic interference add Ferris RF chocks to USB cablesandpower cables

Bad USB cable

Bad power supply these things need 12v or more up to 13.8v

When I image NB I run gain 250 which makes for noisy subs but by dithering all the noise is taken care of.

Just dither
CS!