Opticron Oregon 4 PC Oasis 10x50mm Roof Prism Binocular Black Full Size. Specifications for Opticron Oregon 4 PC Oasis 10x50mm Roof Prism Binocular: Manufacturer: Opticron Color: Black Magnification: 10 x Objective Lens Diameter: 50 mm Prism System: Roof Prism Material: BAK4 Image Stabilizer: No Eye Relief: 22 mm Exit Pupil: 5 mm Field of View Linear: 80 m at 1000 m Field of View Angle: 4.6 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 22.4 Interpupillary Distance: 2.4 - 2.9 in Close Focus: 2.5 m Diopter Adjustment Range: 3.5 dpt Water Resistance Level: Waterproof Length: 170 mm Weight: 29.8 oz Fabric/Material: Polycarbonate Aluminum Alloy Package Type: Box Magnification Type: Fixed Width: 130 mm Depth/Thickness: 60 mm Features of Opticron Oregon 4 PC Oasis 10x50mm Binocular Roof prism design with sophisticated twin relief rubber covering Nitrogen gas filled waterproof construction BAK 4 fully multi-coated optical system (all air/glass surfaces) Phase corrected prism coating with Oasis high light transmission coating Twist type retractable eyecups Wide wheel focusing Full field of view wearing glasses Tripod adapter socket Package Contents: Opticron Oregon 4 PC Oasis 10x50mm Binocular Case Neckstrap Cleaning cloth Lens covers Rainguard Opticron 30768: Oregon 4 PC Oasis 10x50mm Roof Prism Binocular Black Full Size