Diagonals

A brand new premium 2" dielectric diagonal by RVO includes a 2" - 1.25" adaptor, 2" barrel for use with refractors, and also a high quality adjustable SCT adaptor for direct use with SCT telescopes.

The RVO Horizon 2" Quartz Dielectric diagonal is a high end diagonal featuring a Quartz mirror that offers greater thermal stability, resulting in minimal thermal expansion and contraction.

For use on Refractor telescopes to provide correctly orientated views. If you want to use your scope for terrestrial viewing and want nice, bright, clear images, then this is the item for you.

Dedicated 1.25" dielectirc mirror diagonal made especially for use with latest Star71 71mm f/4.9 apo imaging refractor telescope. Allows you to use this scope visually with any 1.25" eyepiece.

Introducing the new William Optics Dura-Bright diagonal - a dramatic step forward in the evolution of mirror diagonals!

Upgrade your existing star diagonal with this premium Celestron 1.25" Dielectric Star Diagonal with Twist-lock ensures maximum light transmission without loss of optical quality.

The Series 5000 2" Enhanced Diagonal from Meade is for use with all Meade LT, LS, LX90, and LX200 telescopes. It also supports other models with standard, "Schmidt-Cassegrain" type, rear cell threads.

The Tele Vue Enhanced Aluminum mirror coating provides a 96% reflective surface across all but the extreme ends of the visual spectrum.

A high grade star diagonal mirror with a very precise mirror surface (approx. 1/12 lambda) for demanding users.

The new T-2 Maxbright Mirror Diagonal uses the proprietary Baader Maxbright all-dielectric mirror coatings, which delivers outstanding mirror flatness.

The telescope side of all our T-2 diagonals accepts an entire armada of Baader-adapters, be it for 1 1/4" or 2"focusers or for a Celestron OTA 2" thread or an original M44 Zeiss thread, there are also adapters for Vixen OTA's or russian MAK's.

Introducing our new 2" XLT Diagonal. This high quality multi-coated mirror diagonal allows you to take advantage of the wider field of view provided by 2" eyepieces. Featuring our premier StarBright XLT coatings, this unit has an interferometer tested 10th wave flat mirror.

A superbly crafted 2" dielectric 1/10 wave diagonal from Baader with the patented clicklock system for safe accurate clamping of eyepieces and accessories.

-2 BBHS® Mirror Diagonal, solid metal body only, with male/female T-2 thread. (BBHS® = broadband hardsilver coating with dielectric protective overcoating)

T-2/90° Baader Roof-Prism. Manufactured by Zeiss standard, both sides with T-2 system threads. This Prism is multicoated and built in a solid metal body. T-2-thread on both sides, therefore extremely short and adaptable on every telescope system.

Upgrade your existing star diagonal with this premium Celestron 2" Dielectric Star Diagonal with Twist-lock ensures maximum light transmission without loss of optical quality.