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Hi Mick,
I have a Losmandy G-11 mount (non Gemini), and image through a Celestron C9.25. I use a Celestron ST80 as a guidescope and have found it excellent. I am using a unmodified ToUCam as the guide camera. The guidescope is attached to the Main OTA using Losmandy DR108 rings. These are great as they let me move the guidescope all over the place until I find a guide star.
System works together like this...
* Imaging with C9.25 & Canon300D, mostly with f/6.3 focal reducer.
* Guiding...
-- ToUCam in back of ST80 to PC via USB cable. Never had a problem finding a guidestar yet.
-- PC running K3CCDTools2 in Guide mode issuing LX200 commands for guiding
-- Serial output of PC to LX200 emulator (my star-mate)
-- ST4 output from LX200 emulator controlling mount movement using ST4 signals.
Clear as mud!..!!
Ok the purists out there will see a glaring hole in my system.... Can you guess??
I am imaging with C9.25 at a focal length of 1480mm (f/6.3), and guiding at a focal length of 400mm!! The opposite should be true. However my results are fine and if you think about it, I essentially have a 3pixel error in my image. Even the smallest stars end up coming out at over 5pixels anyway! Atmospheric turbulance will affect image quality way more than this error... Anyway I'm rambling, but hopefully you get am idea of what I use!
Cheers
Rob
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