Stellarvue Dielectric Star Diagonal - 2"

This Dielectric star diagonal (2-inch barrel) from Stellarvue uses a thick, over-sized mirror polished to 1/10th wave. The mirror has a protective, dielectric coating with 99-percent reflectivity. The body has carbon fiber sides. It has a Collet-type twist lock chuck on the 2-inch eyepiece tube and the deluxe 1.25-inch compression ring adapter is included. Both the 2-inch insert tube and adapter have filter threads. These diagonals are double tested at Stellarvue for perfect alignment and performance.  Star diagonals are a critical component of any refractor.  The performance of an otherwise excellent telescope can be seriously compromised using a diagonal that is misaligned or pinched. Each diagonal and erecting prism Stellarvue sells is tested for alignment and will preserve the exceptional quality of your Stellarvue telescope.   The D1028ECF uses a twist lock Collet. Rotate the twist lock lever counter-clockwise to open. Insert the 1.25-inch adapter or 2-inch eyepiece and t