Celestron – SkyMaster Pro 20x80 Binocular – Outdoor and Astronomy Binocular – Large Aperture for Long Distance Viewing – Fully Multi-Coated XLT Coating. RSR "REFLEX SIGHT READY" RAIL: SkyMaster Pro's unique detachable RSR rail allows you to mount an optional red dot finderscope or other reflex sight.
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