82 degrees field of view - high and low times have a wide field of view.Raise the eye cup - the low edge designed for eyeglasses.Spotted eyepiece - Replace the same series of eyepieces with little or no focus.Threaded light pipe - can be installed 2 "Star Trang with a threaded filter.Polished and hard alumina passlight - scratch resistant high quality appearance.Rubber gripping ring - safe gripping eyepiece and easy to turn the cup. Focal length (mm) 23 mm Weight (g) 479 g Field of view (deg) 82 ° Visual clearance (mm) 20 mm Optical coating full surface multi - layer coating Size 2 inches (51 mm) Whether it is Field diaphragm 37 mm
