The 90 Everbrite Diagonal - 1.25-Inch by Tele Vue:
When it comes to outright optical quality, no one quite does it like the folks at Tele Vue. The Tele Vue Everbrite star diagonal is now offered in both 1.25-inch and 2-inch models and are CNC machined from a solid block of aluminum. Permanent alignment of the interior optics is absolutely assured and the quality construction means it will fit every 1.25-inch or 2-inch focuser or visual back it meets, and every 1.25-inch or 2-inch eyepiece or threaded filter will equally fit. Adding heavy accessories won't phase the Tele Vue Everbrite Diagonal. It is guaranteed to never come apart and both focuser and eyepiece barrels are anti-reflection threaded internally for higher contrast.
Inside the solid mirror housing is a Pyrex mirror-type star diagonal which sports Everbrite dielectric mirror coatings for 99-percent reflectivity. For those who own reflector telescopes, you know that Everbrite coatings provide superior contrast and resolution. For the refractor and SCT, this means cutting edge images for lunar, planetary and double star work.
To hold the eyepiece in place, Tele Vue Everbrite Diagonals utilized a non-marring soft brass compression ring to hold their precious cargo in place. This means a nick-free and scratch-free surfaces for your expensive eyepiece barrels - and without screws to lose in the dark. Tele Vue considers every angle their equipment is used at and a special channel is cut right into the barrel to act as a safety stop. This will keep the diagonal, and your eyepiece from falling should it accidentally loosen from the focuser.
This is the same star diagonal Tele Vue builds for their diffraction limited telescopes, and is exquisitely crafted to fold light exactly 90-degrees. The Tele Vue Everbrite Star Diagonal is simply top of the line and will give you the visual performance your Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor telescope is capable of delivering.
OPT Product Number: TE-DPC-1250