The GL25 Eyepiece fits Vixen 52mm, 67mm, and 82mm spotting scopes, with magnifications of 18x, 25x, and 33x, respectively. Its fully multi-coated optics assure optimal light transmission, and its medium-strength magnification makes it a good choice for digiscoping.Specifications:- Magnification: 11x with 52mm scopes, 15x with 67mm scopes, 19x with 82mm scopes- Angle of View: 3.2 with 52mm scopes, 2.9 with 67mm scopes, 2.3 with 82mm scopes- Field of View: 56 m @ 1000 m with 52mm scopes, 51 m @ 1000 m with 67mm scopes, 40 m @ 1000 m with 82mm scopes- Exit Pupil Diameter: 4.7 mm with 52mm scopes, 4.3 mm with 67mm scopes, 4.0 mm with 82mm scopesIn the Box:- Vixen Optics GL25 18x/25x/33x Spotting Scope EyepieceModel: VX1829