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: 10x. Effective aperture of the objective: 50mm. Angle of view: 5.0 degrees. Field of view (at 1000m): 87.5m. Exit pupil: 5mm. Ocular clearance: 20mm. Relative brightness: 25. Minimum focusing distance: 5.5m. Height (approx.) 178mm. Width (approx.): 183mm. Thickness (approx.): 79mm. Weight (approx.): 1060 gr.