Cassini PM-135 - Telescope PRIMARY MIRROR : 135mm For Sale
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Cassini PM-135 - Telescope PRIMARY MIRROR : 135mm:
$39.99
ONLY THIS ONE...PERFECT ONES ARE LISTING FOR AN ADDITIONAL $10
USED AT A TRADE SO SLIGHT IMPERFECTIONS... NO DEEP SCRATCHES THAT WOULD AFFECT ITS USE IN BUILDING A TELESCOPE
SPHERICAL PRIMARY MIRRORS
135mm Diameter
Diffraction Limited L4 (1/4 wave in Sodium Light)
Plate Glass
Aluminized(92%) and SiO(Quartz Overcoat)
Resolving Power(arc seconds): .97
APPROXIMATELY 12mm THICK
FL (focal length) 1000mm Pre Set Collimation Dot hand Crafted and Ronchi Tested for high Reflectivity
Please see other listings for secondary mirrors for those that like to build their own telescopes.
FREE ship rate is for within the Continental U.S.
Thanks, Mary