Fully coated lenses fold down eyecups and BK7 prisms round out the list for Tasco Essentials Porro Full-Size Binoculars. Field of View (ft.@100yds./m@100m): 367/122 Weight (oz./g): 27/770 Magnification X Objective Lens: 10x 50mm Weight (oz./g): 27/770 Size Class: Standard Focus System: Center Prism System: Porro Lens Coating: Fully Coated Close Focus (ft): 18 Model: 170150 Color: Black