THESE ARE BRAND NEW 102mm SPHERICAL PRIMARY MIRRORS+ HEAVY DUTY MIRROR CELL
Mirror Cell Outer Dimensions: 145mm
Mirror Cell Inner Dimensions: 140mm Heavy Duty Mirror Cell with Push/Pull Collimation Screws Metal Housing
Mirror dimensions: 102mm Diameter
Diffraction Limited L4 (1/4 wave in Sodium Light)
Aluminized(92%) and SiO(Quartz Overcoat)
FL (focal length) 900mm
Pre Set Collimation Dot Hand Crafted and Ronchi Tested for high Reflectivity Resolving Power (arc seconds): .97
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. Write for international rate.
Thank you, Mary
Filed under: Eyepieces & Accessories