Specifications BrandESSLNBModelES4036Enlargement10XObjective Diameter56mmPrism TypeBAK4Lens CoatingFMCEXIT PUPIL DIAMETER5 5mmExit PUPIL DIST175mmField of View6 3°Waterproof and fogproofYesSize163 86 66mmWeight490g Features 1 BAK4 PrismED Len Equipped with an ED lens and BAK4 prism the monocular offers greater light transmission giving you crystal clear views with higher contrast and fewer color errors and distortions reducing light scatter for professional birdwatchers 2 Fully Multi Coated Featuring full multi coating technology the monocular minimises light reflection and maximises light transmission for crystal clear images with vibrant colors even at long distances 56mm large objective enables enough light go through the optical tube and get brighter view 3 23mm Large Eyepiece The 23mm large eyepiece increases light transmission throughout the entire optical path allowing you to experience nature like never before and immerse yourself in the moment 4 IPX7 WaterproofFogproof The IPX7 nitrogen filled design makes the monocular waterproof fogproof dustproof and shockproof in all weather conditions so you don t have to worry about being caught in an unexpected rainstorm 5 10X MagnificationWide Angle 10x magnification and 6 3° wide field of view monocular telescope providing a larger more comfortable view and clearer details for an unrivalled viewing experience 6 Easy to UseMulti application The monocular is easy to use and only needs to be adju