When using night vision eyepiece, eyepiece cup must be
used to prevent detection.
The sharpest image will be observed only when the
course and diopter adjustments are properly focused.
The course adjustment ring (6) is used to focus on the
target at varying distances. The diopter adjustment
ring (7) is used to focus your eye (with or without
glasses) on the image intensifier screen. These
adjustments operate independently and must be made
With the M25 Stabilized Binocular to the operator's eyes, adjust the
focus as follows: