When a person holds a binocular in their hands they cannot hold it perfectly
still. This small amount of movement, called, "jitter," is magnified by the
optics. If the magnification of the binocular is high enough, as is the case
with the M25 Stabilized Binocular, this blurring can degrade the image. It
has been found that by stabilizing the prisms inside the binocular, the image
is also stabilized and the clarity retained.
The prisms inside the M25 Stabilized Binocular are mounted on a platform
that can swivel independently of the rest of the binocular. A tiny motor
driven gyroscope also sits on the platform. The gyroscope helps to remove the
hand jitter that would otherwise degrade the image.