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ASI128MC Pro Manual
10
5.4 Cooling System
The ASI128MC Pro camera have a robust, regulated cooling system, which means that the
camera sensor can be kept at the desired temperature throughout your imaging session. The super
low readout noise, combined with efficient cooling and adjustable gain setting, allows you to do
short or lucky DSO imaging unlike the traditional CCD cameras which need very long exposure
for each frame. However, keep in mind that cooling won’t help with very short exposure such as
less than 100ms. The lowest temperature that can be set is -30℃~-35℃ below ambient.
Here is a dark current test result of ASI128MC Pro sensor at various temperatures.
5.5 Back Focus Distance
The M54 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.
5.6 Protective Window
There is a protective window before the sensor of ASI128MC Pro camera.
It’s an AR-AR coated BK7 glass, diameter is 60mm and 2mm thick.
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