Visionking 25-75x70 Maksutov Spotting Scope 100% Waterproof Bak4 with Tripod(Green) Full Coated Optic MAK Construction,Super Compact body,easy to carry, O-ring sealed,100% waterproof Dry Nnitrogen-purged and Sealed,100%fogproof Dry Nnitrogen-Purged and Sealed,100% fogproof Bak-4 Prisms that maximizes light transmission Fully multi-coated optics for superior brightness large eye lens for comfortable viewing