For sale: BERKUT binoculars, Russian made. Front lens diameter: 35 mm Provides good illumination and a clear image, especially during the day and before sunset. Field of view: 150 meters / 1000 meters Wide field, suitable for tracking moving objects. Russian made Known for durability and toughness compared to light commercial types. The binoculars are old and original. Very clean, and its lenses are clear and sharp.