Thread: Optical flats: Where can I get them?
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Old 23-03-2013, 02:04 PM
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MrB (Simon)
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Quote:
Originally Posted by OzEclipse View Post
A cheap newt secondary, especially a mass produced Dob type is unlikely to be 1/20 wave.
As Ken has said, not cheap(realistic IMO), but they do claim 1/20th.
http://www.astrosystems.biz/secm1.htm
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