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C102F Optical Configuration OUESTION

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#1 M11Mike

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Posted 13 September 2019 - 05:28 PM

OK APO refractor experts - need your help.  Just reacquired a long lost love - a nice Celestron C102F (Fluorite)  refractor OTA from a fellow CN's member (thank you Scott).  While I had one of these in the late 90's / early 2000's - I made a mistake and sold it (had cateracts but got them 'fixed' and am finally after all these years replacing my scope).   And while reacquainting myself with the scope's "specs" today - I can't seem to find a internet link I had that showed the lens configuration.....ie. where is the fluorite element???  I believe it's the INNER element and not the field lens but honestly can't remember.

 

Can someone help me out here???  (finding this link that had a diagram of the lens layout along with a narrative regarding the Vixen lens, who made it, etc.).   If memory serves it was Canon that made these lenses for Vixen or a sub-contactor of Vixen???

 

Also - where the name "Vixen" came from - one website said it was one of Santa's reindeer???   

 

Thanks soooo much gents (and ladies) ....

 

Clear skies - M11Mike     



#2 jeffmac

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Posted 13 September 2019 - 05:48 PM

The fluorite lens is the inner element. Enjoy.

#3 Steve Allison

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Posted 13 September 2019 - 06:01 PM

Congratulations on acquiring one of the finest visual refractors ever made. And I don't have to suggest you get a Tak! smile.gif



#4 Nippon

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Posted 13 September 2019 - 06:15 PM

It is a  Steinheil doublet design with fluorite element in the rear. And like the Takahashi FC scopes of the same day the fluorite element is uncoated.




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