Model Name 71008Brand CelestronMaterial SyntheticEye Relief 13 MillimetersBinocular Prism Description Porro PrismAbout this item 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