As for 3 models which carries the diameter object lens of 42 mm, all are the extensive field-of-view designs of 65 degrees or more of appearance views. You can use for a broad use, looking at the nebula and star cluster which spread in the universe, or enjoying the sport in a powerful field of view.[Distinction], Multi-coated, BaK4 Pore prisms Fully waterproof (JIS Class 6), Apparent field of view: 65 Degree, A high-eye point design provides longer eye relief with or without eyeglasses, Easy to use, twist up eyecups, Click-stop diopter adjustment ring, Large focus ring for precise, easy adjustments, Rugged and light, aluminum die-cast body, Impact resistant, easy to grip rubber exterior, This model can be mounted onto a “Tripod Mounting Holder”, Environmentally friendly, lead and arsenic free glass (eco-glass).[Specification], Magnifications: 8 times, Objective diameter: 42mm, Field of View: 8.2 Degree(Wide), FOV@1000m: 143.4m, Exit Pupil: 5.3mm, Brightness: 27.6, Eye Relief: 17mm, Close focus distance: 5.5m, Size: H138.5xD73xW176mm, Weight: 770g, Attachments: Case, strap