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Jimbo, I have used an SSAG before and it worked ok for many years. Now I use a SBIG ST-I. I chose that because it is really sensitive, it goes straight into a MOAG as well screws onto a QSI OAG. I have been very happy with its performance. It can pick out stars that are very faint on my f5.8 system with OAG's. It guides on any software out there.
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