TeleVue 2" Standard Enhanced Aluminum Star Diagonal. In very good condition. Has knife edge baffles in both barrels and is threaded for two-inch filters. Shows set screw marks from normal use but clean otherwise.
“This is the same Star Diagonal we build for our diffraction limited telescopes. Exquisitely crafted to fold light exactly 90 degrees. The mirror blank is polished to 1/10th the wavelength of light and vacuum coated with enhanced aluminum. Then it’s overcoated to protect the delicate mirrored surface. To ensure the optical alignment of the diagonal, the body is CNC machined from one solid block of aluminum. For maximum contrast we cut anti-reflection threads into the inner surfaces. If you’ve ever had the experience of fumbling in the dark while moving your filter from one eyepiece to another, you will especially appreciate the convenience of the 48mm filter threads cut into the body. A captive eyepiece lock-screw adds the finishing touch.”
Sells new for $210.00 asking $165.00 priority mail shipping included to the lower 48 states.