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1.25" Enhanced aluminum 96% reflectivity mirror diagonal
$189.00This 90° 1.25" mirror-type star diagonal uses enhanced aluminum mirror coatings for a full 95% reflectivity. The mirror is overcoated with quartz for long life. The mirror housing and 1.25" barrels are precision-machined from a single block of solid aluminum, rather than being simply a pair of less-rigid tubes screwed into a flimsy plastic mirror housing or sheet metal stamping, as with lesse . . . -
Celestron 1.25" Prism diagonal
$49.95A Star Diagonal lets you view objects that are at a 90° angle from the direction the telescope is pointing, thereby allowing comfortable viewing when the telescope is pointed at, or near, the zenith (i.e. directly overhead). The resulting image is right side up, but will be reversed from left to right. . . . -
Questar straight-through roof prism for 3.5" Questar scopes
$453.00This straight-through roof prism image erector is designed to use 1.25" Questar thread-in eyepieces on Questar 3.5" Maksutov-Cassegrain telescopes only. -
1.25" Everbrite 99% Reflectivity mirror diagonal
$285.00This 90° 1.25" first-surface mirror star diagonal has Everbrite dielectric mirror coatings for a full 99% reflectivity, the highest possible . . . -
Celestron 45° Prism for 1.25" eyepieces
$49.95This 45° image erecting diagonal is for 1.25" eyepieces in catadioptric telescopes with a 1.25" visual back or in refractors with a 1.25" focuser drawtube . . . -
1.25" 99 Percent reflectivity Everbite mirror, 60 degree viewing
$322.00This unique 60° viewing angle 1.25" diagonal is a sensible step up for comfortable extended viewing of the Moon and planets, as well as more comfortable terrestrial observing . . . -
1.25" mirror diagonal for Brandon eyepieces on a 3.5" Questar
$335.00This Questar #19107 star diagonal is designed for axial viewing with 3.5" Questar telescopes only . . .
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Astro-Tech 1.25" 99% Reflectivity dielectric mirror diagonal
$79.95This 1.25" dielectric mirror-type star diagonal was a Sky & Telescope Hot Product for 2007! Considering its performance, it would be an outstanding value at twice the price. At its economical low price, it's still a hot product, and nothing short of sensational . . .
