Well, I checked the specs on my SBIG ST-9 and it reads; Temperature Regulation ±0.1°C. Also just a note, the ST-9 has a CCD Kodak KAF-0261E + TC-237. I wonder who made the cooler for this camera. This camera is long since been removed from production and sale.

Cooling - standard Single Stage Thermoelectric,
Active Fan, Water Assist Ready
-45 C from Ambient Typical
Temperature Regulation ±0.1°C

I added the water assist to this camera.
Perhaps my next inquiry needs to be directed towards the manufacturers now being Diffraction Limited as they bought SBiG and sale their new cameras now.
Regards,
John

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