2 USED SPHERICAL PRIMARY MIRRORS
Minor cosmetic imperfections from use
Diffraction Limited L4 (1/4 wave in Sodium Light)
Aluminized(92%) and SiO(Quartz Overcoat)
Resolving Power(arc seconds): .97
FL (focal length) 700mm.
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.
Filed under: Eyepieces & Accessories