Orion Binocular Viewer for Telescopes with 2x Barlow Lens

The Orion Binocular Viewer comes with a thread-on 2x Barlow lens, so you can choose two levels of magnification. The hinged aluminum housing contains fully multi-coated BAK-4 prisms that provide high light transmission. You can use almost any matching pair of 1.25" eyepieces. Individual helical focusing collars ensure a sharp focus for each eye.

The viewer's 1.25" nosepiece is threaded to accept filters. The Binocular Viewer works with all types of telescopes. On reflectors or short-focal-length refractors you may need to use the barlow lens to accommodate the requirement for 4" of additional inward focus travel.