Carson VP 10x42 Binoculars - Manual (Page 2)

FOCUSING YOUR BINOCULARS:
While viewing an image, adjust the center focus wheel for distance.
Please note that certain binoculars have different focusing systems. Some may only contain a center
focus wheel which will focus both eyepieces simultaneously. Some may employ a central focus wheel with a
rotating left eyepiece. Others will not have a center focus wheel and you must turn each eyepiece inde-
pendently to focus. Never try and force an eyepiece if it was not designed to turn. This may seriously damage
your binocular.
ROLL-DOWN EYECUPS:
Your binoculars may be fitted with rubber eyecups designed to exclude extraneous light. If you wear eyeglass-
es, you may be able to roll-down the eyecups. Some binoculars are outfitted with twisting eyecups which raise
and lower the eyecups. For eyeglass wearers, lowering or rolling down the eyecups will bring your eyes closer
to the binocular lenses, thus providing an improved field of view. Please note that not all binoculars are
equipped with roll-down or twisting eyecups.
TYPES OF BINOCULARS:
Standard binoculars traditionally offer magnification in one set power only and they use a wheel or knob used
to engage the focus mechanism.
Fixed focus binoculars cannot be adjusted and are usually fixed at an average distance. They are normally
used for concerts, opera, or any situation in which variable focusing on objects is not required.
Zoom binoculars are equipped with a zoom function to allow you to take a closer
look at the object you are viewing. In order to operate a zoom binocular, you must first
focus on a distant object. To zoom in, simply adjust the zoom lever or switch to the
desired magnification setting. Please note that you may need to adjust the center focus
wheel slightly when changing the power setting. 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.
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.
Roof Prism Systems: The prisms overlap closely allowing the objective (front)
lens to line up directly with the eyepieces. The result is a slim, streamlined shape in
which the lenses and prisms that magnify and correct the image are in a straight line.
Porro Prism Systems: The objective lens is offset from the
eyepiece. Light is redirected through the binocular internally.
The result is a shorter, stockier shaped binocular. In general,
porro prism binoculars offers a wider field of view. Most
zoom binoculars use the porro prism system.
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