User Manual
Zoom binoculars oer the user a range of magnications. The zoom function can be operated by
hand using a lever, or by switch when driven by a motor. Zoom systems vary by model.
Waterproof binoculars and fog-proof
binoculars should be nitrogen purged and O-ring sealed in
order for their internal lenses to be truly resistant to fogging and/or water damage.
Use of a Tripod Adapter: Many binoculars can be mounted to a tripod using a standard binocular
tripod adapter. Your binocular may contain a thread that can accept a tripod adapter. To expose this
thread, look for a tripod socket cover (typically located between the objective lens barrels of your
binocular). Twist this cover counter clockwise to remove it. Then
attach the threaded portion of the adapter to your binocular,
twisting in a clockwise direction until tight. You may then
attach the bottom of the adapter to your tripod.
Note: not all binoculars contain a tripod adapter thread.
Style of Binoculars
– Porro or Roof Prism Design
Binoculars come in two distinct styles in which the design is dependent upon the type of prism system
used. The image that passes through a binocular is upside down (a function of the lens) and needs to
be corrected. The prism is the optical glass inside a binocular whose purpose is to “invert” the image.
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