Steiner Refocus Lens Night Vision Accessory - AN/PVS-21 Black. This allows the operator to perform momentary close-in tasks such as map-reading or weapon clearing. The operator can then instantly return the NVG to infinity by flipping the lens back to its storage position. Night Vision Refocus Flip Lenses are specifically designed for use with many of the currently fielded NVGs including: AN/AVS-6 AN/AVS-7 AN/AVS-9 AN/PVS-14 AN/PVS-15 AN/PVS-18 AN/PVS-21 AN/PVS-23 AN/PVS-31 This accessory may be attached to the objective on either side of the night vision goggle through a simple finger clamp. A lens pivots in front of the objective lens storage position. This storage position lies completely outside the optical path of the goggle. Features of the Universal Refocus Lens: Custom focus ranges are available Angular Field of View: 30 Focus Range: 20in to 24in Applications: AN/PVS-7 -14 -15 -18 -23 -31: AN/AVS-6 -9 Dimensions: 41mm (1.6in) x 54mm (2.1in) x19mm (0.75in) Weight: 10.5g (0.4 ounces) Features of the AN/PVS-21 Refocus Lens: Angular Field of View: 30 Focus Range: 20in to 24in Applications: AN/PVS-21 Dimensions: 48mm (1.7in) x 45mm (1.7in) x 30mm (1.2in) Weight (approximate): 12g (0.5 ounces) Specifications for Steiner Refocus Lens Night Vision Accessory: Manufacturer: Steiner Color: Black Package Contents: Steiner Refocus Lens Night Vision Accessory Steiner Optics Warranty The Steiner Heritage Warranty means we stand behind our products. Over half a century of experience building rugged and reliable mil-spec product and supplying them to armed forces all around the world allows us to have this kind of confidence. We at Steiner are totally committed to the very highest standards of quality dependability and most of all customer satisfaction. Our Heritage Warranty assures you of that commitment. Warranty information and warranties are supplied solely by the manufacturer and not this retailer. This retailer publishes information from the manufacturer for information purposes only and the manufacturer is solely responsible and liable for any warranty information and warranties published by this retailer. Please reference the appropriate manufacturer documents or reach out to the manufacturer directly for full warranty terms and effective dates. Steiner 9412: Refocus Lens Night Vision Accessory - AN/PVS-21 Black