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Philip,
Do you have a Celestron or Meade reducer? in my haste at getting a bargin I purchased a Meade reducer, which really mucks up the back focus expecially on the old model C9.25" due to the reducers own focal length (there are a few good posts showing the difference between the Meade, Celestron and Anteres I think is the third one and how they each have different focal lengths and act differenltly on each scope). I loose around 70mm of back focus by using a Meade reducer on mine, I could not even use the Celestron T adaptor it was too long and could not reach prime focus at all with my Canon. I then purchased the Bintel brand adpator which is only half as long. If I was to use the OA guider I will also have purchase a Celestron Reducer (this hobby sure chews through the money)
I had no idea the starshoot still used PHD I was under the impression it came with its own propriatry software, so like you said would not gain much really I would only be taking the GPUSB out of the link which probably would not make a whole lot of difference.
Thanks for your help Philip
Carl
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