Features Waterproof BAK4 Optics Long Eye Relief UBX Fully Multi-Coated SHR Metallic Coated PXA Phase Coating A-lock Diopter System end tabSpecs Item Number 77 Magnification 10X Field of View 341/1000yds Waterproof Yes Fogproof Yes Lens Coatings UBX Fully-Multi-Ctd, SHR Metallic Ctg, PXA Phase Ctg Eye Relief 16mm Exit Pupil 4.2mm Focuser Type Center Objective Lens Diameter 42mm Apparent Field 5.8? Close Focus 6.5ft Prism BaK-4 Eyecup Type Multi-Position Twistlock Weight 29.4 oz end tabWarranty USA Limited Lifetime Warranty when product is registered within 60 days of purchase. Click Here to register. end tab CA Residents: Prop 65 WARNING(S)