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Alex
Very ingenious, love home made accessories
I made a cooling fan for my DSLR to reduce the sensor temp by 5 to 7 degrees using a 60mm high velocity axial fan ( not to reduce dark current but to prolong the life of the sensor during long exposures)
Works a treat and does not affect guiding at all , I’ve guided with and without it on the same night and no discernible change in guiding error on DEC or RA
Here’s some photos
Well done !!!
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