2" Everbrite Mirror diagonal with 99% reflectivity coatings, matte satin finish

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This 90° 2” mirror-type star diagonal has Everbrite dielectric mirror coatings for 99% reflectivity. In addition to higher reflectivity than a conventional aluminum or silver coated diagonal, the Everbrite coatings also provide higher contrast and resolution during critical planetary, lunar, and binary star observations. The diagonal is designed for refractors with 2” focuser drawtubes, but will also work with Schmidt-Cassegrains by adding optional rear cell adapter #7785C. Optional 1.25” adapter #2715C allows the use of 1.25” eyepieces in the diagonal. A safety stop at the bottom of the 2” eyepiece holder tube prevents 2” eyepieces or 2” Barlows from hitting the surface of the mirror. However, if you use the #2715 1.25” adapter, it is possible that an exceptionally long 1.25” Barlow may project far enough into the diagonal to contact the mirror surface. Any damage caused in this way is not covered by warranty.

The mirror housing and its 2” focuser and eyepiece holder barrels are precision-machined from a single block of solid aluminum, rather than being simply a pair of less-rigid tubes screwed into a flimsy plastic mirror housing or sheet metal stamping, as is the case with lesser diagonals. A solid metal backplate over 4/10ths of an inch thick holds the mirror securely in place to assure permanent collimation of the diagonal’s parts. The 2” barrel that fits into the focuser or visual back is internally antireflection threaded for higher contrast. It is also threaded to accept standard 2” (48mm) filters. A groove cut into the outside of the 2” barrel acts as a safety stop to keep the diagonal from falling should the scope’s visual back or eyepiece holder thumbscrew loosen slightly from cold or use. The 2” eyepiece barrel uses a non-marring soft brass compression ring to hold eyepieces in place, rather than a thumbscrew that contacts the eyepiece barrel directly. The diagonal is finished in a non-reflective matte satin black finish.

This is an absolutely premium 2” star diagonal that will give you all the visual performance your scope is capable of delivering. It's a worthy upgrade for virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 2” star diagonal.

Weight:
The weight of this product.
19 oz.
Warranty:
5 years
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Overall Product Rating: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics(5.00)   # of Ratings: 1   (Only registered customers can rate)

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1. Avery on 5/7/2013, said: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics
When I decided on the Ethos eye pieces I just couldn't let them join with any other diagonal. I'm sure there are amazing diagonals at a lesser price point - but for me - I'm all in for the most brilliant experience possible. This is a solid piece of kit - a superb adapter. And sooo happy I didnt get the shorty - otherwise my 21mm Ethos wouldn't have fit (too wide - would have been pressed against the the scope).
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TeleVue - 2" Everbrite Mirror diagonal with 99% reflectivity coatings, matte satin finish

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TeleVue - 2" Everbrite Mirror diagonal with 99% reflectivity coatings, matte satin finishCloseup of clamp ring mechanism, also showing internal anti-reflection threading.
 AstronomicsAstronomicsAstronomicsAstronomicsAstronomics (Average: 5.00 | Users: 1)  Only registered users can submit ratings - Register Here
Our Product #: 7780PCS
Manufacturer Product #: DSF-8002
Price: $290.00  FREE ground shipping - Click for more info
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MSRP: $345.00
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This premium 90° 2” mirror-type star diagonal has Everbrite dielectric mirror coatings for 99% reflectivity and is finished in a handsome matte satin black . . .





. . . our 34th year