TeleVue Everbrite 90° 2″ - Diagonal Mirror

TeleVue Everbrite 90° 2″: Zenith mirror: dielectric zenith mirror in 2 inches

The Everbrite 90-degree 2-inch diagonal is the diagonal for the large eyepieces: Nagler, Panoptics, and Ethos models require a mirror that transmits their field of view completely and without loss.

The Pyrex mirror with dielectric coating reflects 99 percent and is flat to within a tenth of a wavelength. A reduction for 1.25-inch eyepieces makes the mirror universal.

Why the dielectric coating matters

Every star diagonal sits right in the middle of the light path; what the coating does not reflect is lost. The Everbrite mirrors reflect 99 percent across the entire visible spectrum, with a mirror surface polished flat to within one-tenth of a wavelength.

Furthermore, the dielectric coating is hard and wear-resistant: no protective layer that ages, but a surface that lasts for decades and can simply be cleaned.

Preventing the weakest link

A telescope is only as good as its worst element in the light path. A mediocre star diagonal costs contrast and introduces astigmatism, which is immediately visible at high magnification.

Anyone who invests in eyepieces of this caliber wants the light to reach the eyepiece unaffected. That is what this diagonal is for.

Featured accessories

The diagonal combines with every eyepiece from the TeleVue lineup; the compression ring also securely holds heavy 2-inch eyepieces. A nebula filter can be screwed directly into the nose of the mirror.

For whom yes and for whom no

• ✓ Refractors and SC telescopes with a 2 inch focus lens
• ✓ Owners of 2-inch wide-angle eyepieces
• ✓ Who is looking for a diagonal for life
• ✗ Newtons
• ✗ Who uses only light 1.25-inch eyepieces

Specifications

You can find the complete product line for this brand at the TeleVue brand page.