Cassini Spherical Primary Telescope Mirror, Plate Glass w/ Quartz Overcoat

102mm Diameter spherical mirror, Diffraction Limited L4 (1/4 wave in Sodium Light. Made of Plate Glass, Aluminized(92%) and SiO(Quartz Overcoat). Resolving Power(arc seconds): .97 and FL (focal length) 900mm. Pre Set Collimation Dot hand Crafted and Ronchi Tested for high Reflectivity

Barrel diameter and thread decide fit. A 1.25-inch eyepiece will not seat in a 2-inch focuser without an adapter, and an adapter adds back focus. Filters are listed by the wavelength they pass and the thread they screw into.

Sold under the Cassini name. The specification block above is published for this listing; check the dimensions against the item you are replacing before ordering.

Handed to the carrier within one to two business days, tracking included. Free US shipping on orders over $58.