... binoculars, waterproof, fogproof, nitrogen filled, BaK 4 prism, twist-up eyepiece, fully multi caoted optics Features: * 100% waterproof, nitrogne filled* Bak ... 4 prism * Fully multi coated optics* Intereral focus * Twist-up eyepiece Item No.IF832IF832CIF842IF10X42 IF10X42CModel8x328x328x4210x4210x42Magnificaion8x 8x 8x 10x 10x Objective diameter32mm32mm42mm42mm42mmExit ...