Pentax UP Zoom Series Binoculars. These binoculars are the multifunctional binoculars of the UP series! Combined in one simple, compact and lightweight binocular, you have the possibility to observe with a magnification from 8 to 16x by simply turning the central wheel. It should also be added that the Up Zoom Series binoculars has all the special features brought to the Up series. Namely, aspherical lens elements for edge-to-edge sharpness, BaK4 prisms and multi-coated lenses for improved brightness and contrast. Magnification: 8-16x. Effective aperture of the lens: 21mm. Angle of view: 5.0 - 3.0 degrees. Field of view (at 1000 m): 87/52 m. Exit pupil: 2,5mm- 1,3mm. Ocular clearance: 14 mm - 11mm. Relative brightness: 6.8 - 1.7. Minimum focusing distance: 3 m. Height (approx.) 111 mm. Width (approx.): 111mm. Thickness (approx.): 55mm. Weight (approx.): 310 gr.