Cooling System; Back Focus Distance - ZWO ASI2600MC Pro Manual

ASI2600 Manual

5.4 Cooling System

The Cooling system of ASI2600 Pro camera can precisely control the sensor temperature. Unlike
traditional CCD, the ASI2600 camera has ultra-low readout noise, efficient cooling, and adjustable
gain. There is no need to use ultra-long exposures to shoot targets, which significantly reduces the
requirements for the photography system as well as the guide system. However, if you use short
exposures (for example, less than 100ms), the effect of cooling on the image will be little. Cooling
system can be set to a minimum temperature of 35 ℃ below ambient temperature.
Here's the dark current curve of ASI2600 sensor between -20 ℃ and 30 ℃

5.5 Back Focus Distance

The female flange to the sensor is 17.5mm. You can reach 55mm back focus distance with the
21mm and 16.5mm extender included in the camera package.
10