Dear Jim -
I read awhile back that you have a Celestron 300 mm
It has been along while since I've seen one. At the Orion
Telescope Store near Santa Cruz circa 1983.
I remember that it was incredibly small for such a long Focal Length.
What is the filter size (diameter) on the front of that lens ?
Does it accept filters on the back side ?
-- Hank Hogan <hogant@xxxxxxxxxxxxxx>
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