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More Information  · Images of Some Features Price $215.00 List Price $250.00 Weight 19 oz Warranty 5 years

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.

This is a very high quality 2" diagonal that is visibly superior in optics and workmanship to the economy and mid-priced 2" diagonals available from telescope manufacturers. It's a worthy upgrade for virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 2" star diagonal.