28-02-2019, 08:34 PM
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Registered User
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Join Date: Nov 2009
Location: Sydney
Posts: 1,193
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Quote:
Originally Posted by Merlin66
Marke,
Just a correction...
ALL the manufactures of Petzval designed (rear element) scopes have confirmed in writing are 100% safe to use without an ERF.
They are all confirmed to be suitable for use with a Herschel wedge with no up front protection.
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Thanks for that
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