Quote:
Originally Posted by Gama
I have a 20" myself, and have it apart at the moment.
Cooling is fine, however, mine was the first ones. The newer ones have side fans now as well. So this helps quite a bit more.
Thermal control (Again the original series) is with a differential pair of sensors. One is mounted on the primary near the base, and the second off the mirror to measure the ambient.
It turns on the fans at any point you want it to. Mine is set to 0.5 deg C, and works fine.
Cool down times are about an hour from opening of Dome slit.
I have had to "Fine Adjust" the focus on extreme temp swings however.
But this may also have been my camera, so a pinch of salt here..
The new models have even more control, so may need to get someone with the new bits on it.
Theo.
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Thanks very much Theo. Do you have an website/image gallery?