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Started by mnevitt, 10/05/2007 02:36AM
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Posted 10/05/2007 02:36AM Opening Post
Mark Nevitt
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Location: Middlesex NJ, US

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If a scope is called a Fraunhofer doublet with BK7 and F2 glass does it have to have CeF correction or can the correction be something different. IF the correction is different is it still a Fraunhofer.

Mark
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Posted 10/05/2007 03:23PM #1
Roland Christen
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Fraunhofer refers to the geometrical configuration that eliminates coma. It does not refer to any sort of color correction.

Rolando
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