With a wide field of view of 135 m. Featuring Porro prisms. Twilight factor of 21. Magnification: 8×, minimum focusing distance: 5 m. Very high image resolution even at night. Ergo Flex eyecups protect against lateral light entry. Porro binoculars. Porro prisms, named after their designer Ignazio Porro, were the first to be used in the manufacture of binoculars. Two prism segments align the image through total reflection and deflect it 180° per segment. The light beam is reflected at the prism interfaces rather than refracted. The advantage of this design is excellent image quality and three-dimensional spatial vision. Bring distant objects up close. Whether traveling, at a sports event, hunting, or at sea - these binoculars are ideal for your active lifestyle.