Excellent optical property, Useful in precision operation, jewel machining, Can uphold if not used, Comfortable for wearing. Binocular loupe: 2.5X It is the binocular loupe of magnification of 2.5X.There are six working distances for choosing: 340mm, 370mm, 420mm, 460mm, 500mm, and 550mm.The depth of field is 80mm, and the visual field is 120mm.It can offer a very clear and wide vision for users. ...