Flat and doubled stars

Flat and doubled stars
« on: April 02, 2021, 02:31:15 AM »
Since a few days I have a problem with my cooled camera (QHY290MM), I get "flat" stars as soon as the cooling is active

I specify that it has nothing to do with a tracking problem, the stars become round again if the power supply of the camera is cut, and they are also round when the cooling is pushed to the maximum.

Without knowing why, everything goes back to normal after 2 or 3 hours.

Does anyone have any idea what could be causing this problem? I specify that no matter the power of cooling of the peltier, the fan is always active and turns at constant speed as soon as the camera is connected to its power supply.