RE: ATM CCD Photography & Dobson/Poncet Tracking

[andydtg@alpha1.phoenix.net]

Re:
>> I don't however see any telescopes below f3.5. Why is this? Surely there
is a CCD freak out there with a desperate need for a 48" f1 mirror?
>> 
>> Is this a practical proposition or is there something (else) I don't
know? Can someone enlighten me?

Sure there are. They're called Schmidt Cameras & can be bought commercially. 
Unfortunately they're not diffraction limited and have focal planes
not accessible for visual use. Biggest ones are in the 48-50" range
at f2.


Andy Saulietis / DTG Alt-Az-Fp Drive Systems
12617 Harriet Ln
Santa Fe, TX 77510 USA
409-925-8854 Voice/Fax