[ap-gto] Re: 1200 tracking accuracy at 3100mm focal length


Jan 3, 2000

 


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#280 Jan 3, 2000

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

teleconverter.

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

www.koyote.com/users/bobm/ngc891.htm



M-82

www.koyote.com/users/bobm/m82.htm



Bobby Middleton



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#281 Jan 3, 2000

Nice images! The picture of M82 has a lot of detail.



> 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

> teleconverter.

> 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

> www.koyote.com/users/bobm/ngc891.htm

>

> M-82

> www.koyote.com/users/bobm/m82.htm



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