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Tele Vue Diagonals

Tele Vue Optics, Inc.
Chester, NY 10918
United States
845.469.4551 Eastern Time (Main Phone)
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All our Everbrite Dielectric and Enhanced Aluminum mirror diagonal bodies are machined from solid blocks of aluminum. Permanent alignment is assured. The one piece body construction also means heavy accessories can't force the diagonal body to "unscrew" from the barrel as with other brands. Both the 1¼" and 2" models feature brass clamp rings, anti-reflection threads and 1¼" and 48mm filter threads respectively. The 2" models include our 2”-1¼” "high-hat" adapter. This adapter is specially designed with a high rise head to keep Tele Vue Barlows and Powermate™ amplifiers away from the diagonal mirror.

● 90° Everbrite Dielectric 1¼" and 2" Mirror Diagonals
Whiter and brighter images. Simply put, that is the benefit the Everbrite mirror coating. This exotic, dielectric, nonmetallic coating is 99% reflective across the full visual spectrum, resulting in the "whitest," most natural image available. Beware, not all "dielectric" coatings are designed with equal performance. "Dielectric" simply means non-conductive substances make up the coating. The coating is painstakingly applied to Pyrex with a surface accuracy of a 1/10 wave flatness.
To ensure performance, every mirror is optically inspected under conditions far more critical than a diagonal mirror is ever used in typical telescopes.

● 60° Everbrite Dielectric 1¼" Mirror Diagonal
It's a real breakthrough for birding and terrestrial viewing; the perfect combination of comfort and performance. This diagonal combines Tele Vue Everbrite performance and optimal ergonomics. Like a 90° diagonal, this yields images that are correct up and down, but reversed left and right.

● 90° Enhanced Aluminum 1¼" and 2" Mirror Diagonals
The 2" Enhanced Aluminum mirror coating provides a 96% reflective surface across all but the extreme ends of the visual spectrum. The enhanced coating provides extra reflectance versus competing standard aluminum coatings. The final coating stage applies a tough overcoat to protect the aluminum. The Enhanced Aluminum mirrors are good budget alternatives, especially where a prism diagonal might otherwise be considered.

● 45° Erecting Prism 1¼" Diagonal
While star diagonals correct a refractor's inverted image, they don't correct the left-right orientation. For terrestrial viewing, choose an erecting prism to achieve a natural view. The 45° Erecting Prism works best at moderate magnifications and are recommended for terrestrial use only.

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