Thread: [WITHDRAWN] C3 celestron Mak
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Old 03-01-2017, 12:55 PM
Wavytone
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Join Date: Jul 2008
Location: Killara, Sydney
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I'm fairly sure these were russian MTO lenses (1000mm f/11) rebadged by Celestron - I had an MTO one years ago that looked identical.

As Brian says, built like tank and optically sharp.