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Old 26-12-2007, 11:33 AM
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iceman (Mike)
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iceman is offline
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,709
I'd also recommend the DMK21AU04, it runs on USB without the need for external power, and can do exposures up to 60 minutes, so getting faint guide stars isn't a problem even with 1-2s exposures.

The DSI's seem to do a capable job though and they regularly come up for sale here.
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