Zeiss Victory 3x12mm Monocular Black Small NSN 9005.80.4040. In this way a pair of binoculars with an 8x magnification can be turned into a spotting scope with 24x magnification in the blink of an eye. It can be quickly fixed onto the eyepiece using an adaptor ring. The Mono 3x12 T can also be used on its own as a miniature telescope or as a magnifying glass at close range. The Mono booster is so small that you can easily take it with you wherever you go. Specifications for Zeiss Victory 3x12mm Monocular: Manufacturer: Zeiss Color: Black Magnification: 3 x Objective Lens Diameter: 12 mm Field of View Linear: 660 ft at 1000 yds Field of View Angle: 12.6 degrees Weight: 1.9 oz Magnification Type: Fixed Package Contents: Zeiss Victory 3x12mm Monocular Zeiss 522012-0000-000: Victory 3x12mm Monocular Black Small NSN 9005.80.4040