Tasco Roof Prism Binoculars 8x21 Black Box. And they'll go anywhere you can thanks to a tough weather-resistant design. Choose from a wide range of models in compact and full size. Specifications for Tasco Roof Prism Binoculars 8x21: Manufacturer: Tasco Color: Black Magnification: 8 x Objective Lens Diameter: 21 mm Prism System: Roof Field of View Linear: 380 ft at 100 yds Optical Coating: Fully Coated Binoculars Focus System: Center Focus Close Focus: 30 ft Length: 2.5 in Weight: 5.8 oz Package Type: Box Included Accessories: Case Strap Magnification Type: Fixed Tripod Adaptable: No Eyecups Types: Fold Down Size Class: Compact Package Contents: Tasco Roof Prism Binoculars 8x21 Tasco 165821: Tasco 8x21 Roof Prism Binoculars Black Box