Specifications

42 AUTOSTAR CCD PHOTOMETRY
Now place the center of the TEC (against the camera back) so it is
directly opposite the cold finger (on the inside of the case). Drill
and tap 2 (or 4) matching holes through the camera case and into
the heat sink. Make sure the hole spacing is sufficient to clear the
TEC. Use two nylon (or non-conductive) screws to hold the heat
sink/TEC to the back of the camera. The purpose of the non-
conducting nylon (plastic) screws is to reduce or prevent heat
transfer from the hot heat sink back to the case.
Carefully reassemble the camera, without tearing or damaging the
rubber sealing gasket, and tighten the four hex head screws on the
front to close the case. Add some foam for insulation around the
camera to keep it cool. See Figure A-7 for a view of the modified
camera with foam insulation added.
Figure A-7. Modified DSI Pro with Focal Reducer, Filter
Wheel, TEC/Heat Sink/Fan Assembly and Foam Insulation.
The optional Meade Series 4000 Focal Reducer lens shown in
Figure A-7 provides a larger field of view for the imager. This
makes finding the stars and getting comparison stars in the same
view much easier.