Thread: My St-i?
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Old 15-12-2014, 09:31 PM
gregbradley's Avatar
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gregbradley is offline
Join Date: Feb 2006
Location: Sydney
Posts: 15,612
Yes that is what I would guess the trouble is. Take it off the guide scope and watch it when you get it going. Perhaps the shutter has some dirt on it and its not fully retracting.

It only does that once and the software uses the same dark to auto subtract.

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