Olympus Trooper 8x40 DPS 1 Binoculars Prism Type BK-7 Porro/Field of View at 1,000 yds 429 ft (130.8 m) Close Focus Distance 13.1 ft (4.0 m) Eye Relief 0.5" (12 mm)/Relative Brightness 25 Weight 25.0 oz (710 g) Dimensions: L x W x H 5.5" x 7.2" x 2.3" (139 mm x 182 mm x 58 mm) Prism Type BK-7 Porro/Field of View at 1,000 yds 429 ft (130.8 m) Eye Relief 0.5" (12 mm)/Relative Brightness 25 Weight 25.0 oz (710 g) Dimensions: L x W x H 5.5" x 7.2" x 2.3" (139 mm x 182 mm x 58 mm) Wide-angle field of view Anti-reflective lens coating for better image brightness Large center focus knob for fast, easy focusing New rugged, high-quality finish with sure-grip rubber coating UV Protection for worry-free viewing