Diagonals

Telescopes contain internal mirrors that reflect light to the telescope's astronomical observing position. In this position, the telescope's image is upright, but reversed left-to-right. This is of little consequence for astronomical viewing, but for terrestrial observing it is highly desirable to have a correctly oriented image. The #928 Erecting Prism delivers a fully corrected image and provides a convenient 45 observing angle for optimal terrestrial viewing.

Meade Series 5000 2" Enhanced Diagonal Mirror #07680. Meade's best diagonal for Meade LX90 and LX200 models. Features an incredible 99% reflectivity over the visual spectrum. For spectacular views of the universe, use the best diagonal on the market - Series 5000. Includes Schmidt-Cassegrain to 2" Adapter. For use with all Meade LT, LS, LX90, LX200, and other models with a standard "Schmidt-Cassegrain" type rear cell threads.

Olivon 2" - 1.25" 90° Prism Diagonal w/BAK4 & FMC Coating

The Opticstar Light Splitter prism diagonal can be used to track or auto-guide and image at the same time. It greatly helps to centre and focus objects to be imaged with a CCD imager or film camera.

Turn any refractor or Cassegrain telescope into a high-performance daytime spotting scope with our Deluxe 45° Correct-Image Diagonal.   

Crafted exclusively for the Takahashi FSQ-106/106N.

Don't rob yourself of the extra light by using a 1.25" diagonal... Get the full effect by going to a full 2" with the Takahashi TDM0200 Mirror Diagonal. You get 10th wave precision in this high quality optical mirror and it includes a 1.25" adapter so you can still use all your favorite accessories, too!

Let's talk quality here. The Takahashi 1.25" star diagonal uses a high quality prism instead of a mirror. This means a lifetime of service where the coatings won't erode.

NOTE: This is a discontinued item. We recommend the DSC-8001, DSF-8002 and DPS-2004 as substitutes/replacements.

99% Everbrite broad band coating, solid body construction.

This is the same 2-inch Star Diagonal that comes with the Tele-Vue 85 and the Pronto. Exquisitely crafted to fold light exactly 90 degrees. The mirror blank is polished to 1/10th the wavelength of light and vacuum coated with enhanced aluminum 96 percent reflectivity. Then it's overcoated to protect the delicate mirrored surface.