Celestron Nature 10x25 Waterproof Roof Prism Monocular Black . The Nature 10x25 Monocular from Celestron features multi-coated optics and weather protection for a reliable waterproof monocular. Anyone looking for a quality monocular that doesn't skimp on optics will appreciate Celestron monoculars as some of the best monocular choices available. Take the Celestron Nature Monocular on your next outdoor adventure and take in the sights like never before Specifications for Celestron Roof Monocular 10x25 Nature 71 210: Optical Design: Roof Diameter: 25 mm (0.98 in) Magnification: 10 x Angular Field of View: 5.8 Linear Field of View (at1000 yds): 304 ft (92.66 m) Linear Field of View (at1000 m): 101 m (331.36 ft) Exit Pupil: 2.5 mm (0.1 in) Eye Relief: 14 mm (0.55 in) Near Focus (Binoculars): 18 ft (5.49 m) Prisms: BaK-4 Optical Coatings: Multi-Coated Weather Proof: Waterproof Weight: 6 oz (170.1 g) Features of Celestron Nature 10x25 mm Roof Monoculars: Multi-Coated for maximum resolution and high contrast views Waterproof and Fogproof for protection in damp environments Rubber covered for protection No Fault Lifetime Warranty Package Contents: Celestron Nature 10x25mm Monocular 71210 Celestron Nature 10x25 Waterproof Roof Prism Monocular Black - 71210