Pentax MARINE 7x50 Owner's Manual

MARINE 7x50

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Binocular
Owner’s Manual

The PENTAX Marine roof prism binocular is de­signed particularly for the boating enthusiast, but
is also ideal for any demanding environment or ap­plication where accuracy and durability is required.

Featuring a liquid-lled compass built in to the

viewing optics, compass “swing” stops immediately
due to an advanced dampening design. Bearings are

dened in easy-to-read precise 1-degree increments,

ideal for navigation and locating objects accurately.

A range-nding scale allows the user to estimate

range based on objects of known size. The PENTAX
Marine binocular is fully waterproof, fogproof, and
shock-protected with sure-grip rubber armoring and
twist-out eyecups for easy use. PENTAX Optics are
fully multi-coated for excellent light transmission
and clarity. The PENTAX Marine binocular comes
complete with a rugged nylon case and neck strap.
Built to last, the PENTAX Marine binocular features
our lifetime Worry-Free Warranty.

SPECIFICATIONS:

Lens Construction 7 elements / 5 groups
Lens Coating Fully multi-coated

Magnication 7X

Eyecup Helicoid type

Waterproof Nitrogen-lled, 1.5m depth

Dimensions 7” H x 5.4”

Weight 34.4 oz (976 g)

How to Use:

1. Adjust interpupilary distance until a single image

circle is formed.

2. Acquire a test subject and sharply focus the le

eye using the center focusing knob.

3. Looking through the right eyepiece turn the di­opter to sharply focus on the same subject.

Each user may have to re-adjust the binocular to suit
their particular vision correction.

Using the Compass:

The built-in precision compass features extremely
fast dampening, so there is almost no “swing” and

it is corrected for latitude (dip). The compass scale is
dened in 1 degree increments and is aligned with
the vertical range nding scale. When using the

compass, always keep in mind the local variation
between magnetic and true North.

Objective Lens Diameter 50mm
Prism Type / Coating BaK4 – silver deposited

Eye Relief 17.6mm
Real Field of View 6.6 degrees
Field of View @ 1000 yds. 348 .
Field of View @ 1000 m 116m
Exit Pupil Diameter 6.8mm
Relative Brightness 51
Diopter Adjustment Range +/-3
Interpupilary Adj. Range 56mm-73mm
Focus Range 3.3 feet – innity (3m –innity)

Reticle:

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The vertical scale of this reticle, (visible through the
right half of the binocular), allows you to calculate

distance from your position to an object, provided its
height is known. You may also calculate the height
of an object if you know its distance from you. De­tailed instructions follow in this manual.

Compass Illumination:

The PENTAX Marine binocular features a compass
illuminator that functions with available ambient

light. Light enters through a small white diuser

disc on top of the compass housing to illuminate the
compass scale. Bright ambient light levels make the
scale appear bright and low light levels make the
scale appear dim. In order to adequately view the
compass scale in ambient light, make certain not to

cover the diuser disc.

Using the Compass Illuminator Lamp:

The PENTAX Marine binocular is equipped with a
built-in LED compass illuminator for use at night

and in low light conditions. The
compass housing is located on
the top right side of the binocu­lar. When the ambient light level
does not permit you to see the

compass scale clearly, depress
the black power buon on top of the compass hous­ing to power the lamp. The lamp is illuminated only

while the buon is depressed. If the illuminator
lamp is dim or does not come on, replace the baer­ies. If fresh baeries do not provide illumination, the

unit may require service.

Changing Baeries:

Both baeries should always be changed at the same
time. To change baeries, use a thin coin to unscrew
the baery chamber cover, by turning it counter-

clockwise. Remove the old bat-

teries. Insert both new baeries

properly seated with “+” facing

up. Replace the baery chamber

cover by turning it in a clock­wise direction; making certain it

is properly sealed (to prevent penetration of outside
moisture). If the binocular is not to be used for an
extended time, remove the baeries. This keeps the
binocular safe from baery leakage during storage.

Baery type: (2) LR43 (1.5v alkaline)
Equivalent types: AG12, G12, 386, CX186 - (1.5v)

IMPORTANT:
AFTER DIRECT EXPOSURE TO SALTWATER OR
SALT-SPRAY, RINSE THE BINOCULAR THOR­OUGHLY WITH FRESH WATER AND WIPE DRY.
AVOID EXTENDED EXPOSURE TO BRIGHT DI­RECT SUNLIGHT AND SEVERE TEMPERATURE
FLUCTUATIONS. IF USED IN VERY COLD TEM­PERATURES, GRADUALLY EXPOSE THE UNIT
TO WARMER TEMPERATURES IN ORDER TO
AVOID CONDENSATION BUILD-UP.

Ranging Reticle:

This reticle features vertical and horizontal scales.
Each minor division on the horizontal scale and ver­tical scale indicates 5 mils and each major division

indicates 10 mils.

Equivalents:

5 mils = .3 degrees
10 mils = .6 degrees
1 degree = 17.8 mils
1 degree = 60 minutes
360 degrees = 6400 mils

Using the Reticle to Measure Azimuth:

Azimuth is dened as the angle (usually in degrees)

between a reference plane and a point. In navigation,
the reference plane is typically true North which is

dened as 0 degrees North. In rotating your view­ing position clockwise to a point due East (from true
North), the azimuth is 90 degrees; due South the
azimuth is 180 degrees, due West the azimuth is 270
degrees, and due North is referenced as 360 degrees

on the compass scale.

The PENTAX Marine’s mil reticle can measure the

azimuth angle, altitude (elevation) angle, and can

help you calculate distance from the viewer to the
object, and the size of an object based on known
distance from the viewer.