2 USED SPHERICAL PRIMARY MIRRORS
Minor cosmetic imperfections from use. One has a longer scratch about 20mm long. We can include cleaning instructions upon request but the scratch seems to be in the coating but seems it did not damage the glass. It is difficult to photograph mirror surfaces but please see the photo for an idea of the condition.
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