| The Denkmeier #R2D Power x Switch is a multifunction 2" star diagonal for primarily for binoviewer use with refractors. It allows an optional Denkmeier binoviewer to reach low, mid, and high magnifications at the touch of a lever with a single pair of eyepieces. It can also be used with 1.25" and 2" eyepieces, but with reduced image amplification capabilities. A Power x Switch diagonal was named a Sky & Telescope Hot Product for 2005.
The #R2D provides excellent versatility allowing a binoviewer to move through up to 6 different magnifications with a low 1.3x power factor to a high power of 3.4x with 4 magnifications in between. This is because The #R2D includes two Power x Switches: one on each side of the diagonal housing. Slide out the binoviewer and slide in a single eyepiece and move through 7 magnifications ranging from 0.75x reduction to 2.3x multiplication. This diagonal can also be used for F/10 SCTs allowing focal reduction, normal magnification, and 2x with binoviewers and single eyepieces.
The Power x Switch has a special low power S Cell that allows the binoviewer to reach focus with virtually any refractor having normal focuser travel capabilities. Two image amplifiers are incorporated into movable arms in its premium 2" star diagonal body. Using these built-in optics, the patent-pending Power x Switch can instantly switch between 1.3x, 2x, and 3x magnifications. You don’t have to buy two separate Barlows and fumble in the dark to change back and forth between them. They’re already built into the diagonal to give you unsurpassed observing flexibility. In a few years, a multifunction diagonal like this may well be standard equipment with all telescopes, but why wait? You can have the future now.
The 2" dielectric star diagonal housing is precision-made for this Denkmeier Power x Switch diagonal by William Optics. It uses non-marring compression ring adapters in the 2" eyepiece holder and in the supplied 1.25" adapter, rather than ordinary thumbscrews that can scratch the chrome barrels of your eyepieces. This #R2D diagonal has 99.4% reflective dielectric coatings on a 10mm thick 1/10th wave first surface mirror. Power x Switches themselves are made in America. All Power x Switch optics are custom designed and have high efficiency broadband coatings on all air-to-glass optical surfaces. All optical components contained in the Power x Switch assemblies have a clear aperture of 37mm for maximum illumination of even the most demanding 1.25" eyepieces.
The #R2D includes a low profile/low power S Cell to allow the Power x Switch to function when using a binoviewer, the 2" Power x Switch diagonal, and a 1.25" eyepiece adapter. Also included is a dovetail connector that allows you to connect your Denkmeier binoviewer body directly to the Power x Switch with no tools required, instead of going through the 2" eyepiece holder. This increases the amount of available back focus, allowing some refractors with limited focuser travel to focus properly. It comes with an engraved aluminum eyepiece holder plug and a 2" machined aluminum sealing cap for the telescope side diagonal tube.
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