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Yeah carbon fibre fixes that constant refocus need. I find my CDK17 and the RCOS 12 I had hold focus extremely well once the mirror is close to ambient.''
This is an interesting thread as it highlights the decision making process a lot would be going through for this type of scope. It inevitably winds up with GSO because of the value and the high quality optics. That's probably exactly why DSI switched markets.
Greg.
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