Comparison of viewing effects. Please note: the New BAIGISH 20X50 telescope. The white LOGO on the telescope. Has now changed into a golden LOGO. Please look at the picture below. Methods: focusing eyepiece focusing. Magnification:8X-24x (Real Magnification, Super Clear). Objective diameter(mm) 40. Eyepiece diameter(mm) 24. Front lens diameter 52. Prism Type (Roof / Porro). Exit pupil diameter(mm) 4.2. Relative Brightness Index (RBI) 17. Field of view(ft /1000 yds) 6.13°. Eye relief(mm) 15.6. Close distance(M) 2. Net weight(g) 612. Dimensions of product (286-560)X52X52. SIZE:31.5CM Extension to 45.5CM.