Celestron 52233 C50 Mini Mak Weather Proof Spotting Scope 1.3 degrees-.7 degrees angular field of view, 68ft at 25x, 35ft at 75x Linear FOV, 20mm at 25x eye relief, 10 at 25x near focus. 50 mm aperture, 580 mm focal length, 25-75 x magnification, 10 in optical tube length, 45 degrees eyepiece, 1.25" eyepiece adapter allows usage of any 1.25" eyepiece.