Tasco Roof Prism Binoculars 10x42 Black Box ES10X42. Field of View (ft.at100yds./mat100m): 185/6Weight (oz./g): 10.22/290Magnification X Objective Lens: 10x 42mmSize Class: StandardFocus System: CenterPrism System: RoofLens Coating: Fully CoatedClose...