1200 tracking accuracy at 3100mm focal length

Bobby Middleton <bobm@...>

I've tried a Nikon teleconverter with my 12.5" f/7 newt on the AP 1200 GTO
mount. It figures out to be 3100mm focal length at f/10 with the
I did some 2 hour exposures of NGC 891 and M-82. Tracking was excellent.
The AP 1200 is certainly up to the difficult task of tracking at long focal
lengths. See the pics at:

NGC 891


Bobby Middleton

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