Thread: Daystar QUARK Ha eyepiece - temperature limits
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Old 11-05-2014, 01:13 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
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Hans,
Up to 80mm aperture - OK
80 -110mm aperture add a UV-IR filter
>120mm use a "proper" ERF up front.
Not suitable for reflectors or compound (Petzval) refractors...
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