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Old 22-02-2013, 04:31 PM
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Steffen
Ebotec Alpeht Sicamb

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Join Date: Feb 2010
Location: Toongabbie, NSW
Posts: 1,975
Yes.

I'd go as far as saying Cheshire for positioning the secondary, then star test for titling the primary But a well-collimated laser is very convenient.

The Barlowed lasers don't just remove errors due to off-centre holding of the laser but also due to crooked focusers, drooping draw tubes etc. But if you're sure your focuser is square any accurate laser will do.

Cheers
Steffen.
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