Quartz Diagonal 2"

If you want a high end mirror star diagonal, this GSO 2" Quartz Dielectric Diagonal Mirrors is your best choice. Quartz mirrors offers greater thermal stability, resulting in minimal thermal expansion & contraction. 

The feature of Quartz diagonal are:

-  Optical glass Quartz mirror blank
-  Reflectivity 99% dielectric coating in the Deluxe star diagonal mirror
-  Housing is an all metal CNC construction
-  Brass compression rings both for 2" and 1.25"
-  The barrel and the 1.25" adaptor both offer a 2" filter thread
-  Excellent mirror surface quality over 1/12 wave