Bresser 90° 2-inch star diagonal: comfortable viewing with 2-inch aperture
With the Bresser 90-degree 2-inch zenith mirror, you can comfortably look into the eyepiece from above instead of having to crouch under the telescope. The mirror is made entirely of metal and features a dielectric coating with a 93% reflectivity rating that is resistant to moisture and aging.
The 2-inch aperture is its biggest advantage: it allows you to use 2-inch wide-field eyepieces for maximum field of view, which is important for deep-sky observations with telescopes that have a long focal length. An included adapter also makes the mirror compatible with all your 1.25-inch eyepieces.



Brass compression fitting
The eyepiece clamp works with a brass ring that exerts even pressure. Your eyepieces stay free of clamping screw scratches, even if you change them frequently.
Which telescopes
Intended for refractors and for Schmidt-Cassegrain and Maksutov telescopes with a 2-inch focuser, including the Bresser Messier refractors with 2.5-inch Hexafoc. Not needed on a Newtonian: there you are already looking into the side of the tube.
Featured accessories
Combine the star diagonal with the Bresser 2-inch polarizing filter to dim the bright moon, or with the Plossl eyepieces for the 1.25-inch part of your kit.
For whom yes and for whom no
- ✓ Observers with a refractor, SC, or Maksutov who want to use 2-inch eyepieces
- ✓ Who frequently changes eyepieces and wants to prevent clamp scratches
- Newton owners: a star diagonal has no function there
Specifications
| Type | Zenith mirror 90 degrees |
| Passage | 2 inch, with adapter for 1.25 inch |
| Coating | Dielectric, 93% reflection |
| Ocular clamp | Brass compression fitting |
| Housing | All-metal |
| Included | 1.25-inch adapter, dust caps |
You can find more accessories for this brand at the Bresser 1TP5 Page.





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