12.5" F4 Cassegrain Primary Telescope Mirror Start Price USD 250.00 Current Price USD 285.00 Time Left - Bid Count 2 Buy It Now Price - Reserve Price - Start Time Saturday, September 06, 2008 End Time Saturday, September 13, 2008 Location Bethlehem, PA See more about '12.5" F4 Cassegrain Primary Telescope Mirror' Description 12.5" F4 Cassegrain Primary bought from the estate of a Kodak Optician.  Dates from the 60's or possibly earlier.  Glass is Clear and cast so I am guessing cast Pyrex.  Full Thickness.  Could use a recoat.  Came in an old wooden box, that is marked as an F4 Mirror.  Find or make a secondary for it, and you have a great scope..... I dont have the time right now. Place a Bid!