Magnification: Continuous Zoom Magnification 5x to 25x (3 Steps & 5 Steps Magnifications are also available on request) Eye Pieces: 10x W.F. (Pair) {12.5x & 15x W.F eye pieces are also available) Objective Lens: F = 200 mm (F=175 mm, 250 mm, 300 mm & 400 mm is also available on request) Field of View: 50 mm