The Danubia Nautical 8x42 Monocular With Compass is a great monocular with a roof prism construction. A rugged black rubber armour provides solid grip,"and protection for this Danubia 8x42 monocular,"so even if the monocular gets damp it can still be held with confidence."It is"fogging-free and waterproof and"pressure tested down to 0.3m (for 10min) - these"are fanastic additional features of the Danubia Nautical 8x42 Monocular. The Danubia Nautical 8x42 Monocular With Compass also features a close focus of 13m as well as an incorporated compass with reticle for range finding. This monocular"also features great"multicoated optics which prevent internal reflection and"allow maximum light transmission. Additionally the Nautical"Monocular by Danubia "features"BAK-4 prisms which aid"light transmission with its superior optical glass."All these features make the Danubia Nautical 8x42 Monocular With Compass ideal for outdoor activities including sailing, golf,"wildlife viewing"and sightseeing. 5 year warranty included.