25x magnification Porto prism binocular. Large 70 mm objective lens offers maximum image brightness in low-light and long-range conditions. Ultra sharp focus across the field of view. Linear Field of View at 1000 yds. At 1000 m: 141 feet (47 m)Exit Pupil: 0.11 inches. Eye Relief: 0.51 inches. Multi-coated optics for sharp, clear views. Suitable for terrestrial or astronomical viewing. Ipd max: 2.83 inch. Protective rubber covering for ultra-firm grip. Long eye relief ideal for eyeglass wearers. Or, you can choose to get a replacement. Our goal is to ensure a happy shopping experience with us.