Celestron Dielectric Star Diagonal 1.25in w/ Twist-Lock Black/Orange

Celestron Dielectric Star Diagonal 1.25in w/ Twist-Lock Black/Orange. 25 with Twist-Lock. Upgrade your existing star diagonal to this premium one and enjoy brighter sharper images without replacing your telescope. This star diagonal reflects the telescopes light path 90 degrees to provide a more comfortable viewing angle. In addition the glass has 58 layers of dielectric coatings which provide an over 99percent reflective surface delivering the maximum amount of light to the eyepiece. The twist-lock eyepiece holder secures any 1.25 eyepieces while keeping them centered in the diagonal thus providing best opto-mechanical alignment between the telescope and eyepiece. Unlike traditional thumb screws the twist-lock cannot scratch or engrave the barrel of your eyepieces. The twist-lock has an integrated 1.25 barrel stop that prevents 1.25 accessories with long barrels from damaging the mirror. All the diagonals mechanical parts are made of machined black anodized aluminum except the twist lock rings which are orange anodized for visibility. The interior of the barrel is glare threaded and painted flat black to prevent glare. With all its features and these high-end finishes the Celestron Dielectric Star Diagonal 1.25 with Twist-Lock is one of the highest quality 1.25" star diagonals that Celestron has ever offered. Standard Star Diagonals vs Dielectric Star Diagonal The key specifications for a star diagonal are its reflectivity and its optical quality. This diagonal delivers top performance in both categories with an over 99percent reflective mirror and diffraction-limited optical quality. This ensures that virtually all the light collected by the telescope will reach the eyepiece without the diagonal affecting optical performance. Using a lower quality star diagonal can both dim the view and degrade optical quality. You can enjoy better views from your telescope by simply swapping out its diagonal for a premium one like the Celestron Dielectric Star Diagonal. Specifications for Celestron Dielectric Star Diagonal 1.25in w/ Twist-Lock: Manufacturer: Celestron Color: Black/Orange Weight: 212.6 g Features of Celestron Dielectric Star Diagonal 1.25in w/ Twist-Lock Diagonal size - 31.75mm (1.25") Diagonal type - Mirror Glass material - BK7 Coatings - Dielectric 58 layers Reflectivity - Over 99percent Optical quality - Diffraction limited Eyepiece holder - 1.25" Twist-Lock Compression ring - Yes single ring Housing construction - Machined aluminum black anodized Barrel interior - Glare threaded and painted flat black Threads for filters - Yes 1.25" Dimensions - 114.3mm x 50.8mm x 88.9mm (4.5" x 2" x 3.5") Weight - 7.5 oz (212.6 g) Package Contents: Celestron Dielectric Star Diagonal 1.25in w/ Twist-Lock Celestron 93571: Dielectric Star Diagonal 1.25in w/ Twist-Lock Black/Orange