203mm Diameter Spherical Mirror
Diffraction Limited L4 (1/4 wave in Sodium Light)
Float Glass
Aluminized(89%) and SiO(Quartz Overcoat)
Resolving Power(arc seconds): .97
FL (focal length) 750mm
Hand Crafted and Ronchi Tested for high Reflectivity.

• 203mm Diameter
• FL (focal length) 750mm
• Float Glass
• Aluminized(89%) and SiO(Quartz Overcoat