The housing are designed lightweight and waterproof and sealed with internal desicants to reduce the possibility of fungus growth - the major cause of cloudy optics in less carefully manufactured binoculars. In addition, thje binoculars are filled with a dry agent to prevent internal oxidation.
There is a central focusing wheel for easy focusing. The left eyepiece cannot be rotated where as the right eyepiece can be rotated to compensate for difference of eyesight between your right and left eyes.
Objective lens 32mm
Feild of view(1000m) - 117m
Exit pupil diameter 4.0