Unbelievably compact, 42mm diameter body Fully multi-coated lenses for maximum light transmission and brightness. Phase coated roof prisms also have a super-high reflective silver coating for high contrast, bright images., Lightweight and highly durable magnesium housing Fully waterproof (JIS Class 6), A high-eye point design provides longer eye relief with or without eyeglasses, Easy to use, twist up eyecups, Impact resistant, easy to grip rubber exterior, Large focus ring for precise, easy adjustments, Environmentally friendly, lead and arsenic free glass (eco-glass)[Specification], Magnifications: 8 times, Objective diameter: 42mm, Field of View: 7.3 Degree, FOV@1000m: 127.6m, Exit Pupil: 5.25mm, Brightness: 27.5, Eye Relief: 20mm, Close focus distance: 2.5m, Size: H133.5xD55.5xW125.5mm, Weight: 700g