This series consists of models with porro prism, BaK4 prism. This series also benefits from a new multi-coating of the lenses which guarantees the user a clearer vision thanks to a better transmission of light. The rubber exterior finish provides excellent shock protection for your binoculars. Magnification: 8x. Effective aperture of the lens: 40mm. Angle of view: 8.2 degrees. Field of view (at 1000m): 143m. Exit pupil: 5,0mm. Ocular clearance: 13mm. Relative brightness: 25. Minimum focusing distance: 6m. Height (approx.): 187mm. Width (approx.): 131mm. Thickness (approx.): 56mm. Weight (approx.): 770 gr.