Quote:
Originally Posted by toc
Wow, thanks for that. Im short of the guide scope and guide cam at the moment, otherwise I would try it on my new setup, when I do get a mount. Could you do this with your main scope, rather than with a guide scope?
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No reason why not, but I would not like to try it with a DSLR or CCD which has a shutter. Shutters only have a finite lifetime. Any webcam supported by PHD would work, but any cam without an ST4 port would require a serial interface to do the guiding. Celestron's handsets, for example, have serial ports. Some others need something like EQMod.
If I put my guide cam on the main scope it would give 0.75 ASP. Since it's 5 times the focal length of the guide scope, it is 5 times as sensitive to tracking errors.
Hmmm. Maybe that's as good a reason for getting an OAG as I've seen.
Andrew