User Manual

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MARINE 7x50

Binocular

Owner’s Manual

The PENTAX Marine roof prism binocular is de-

signed particularly for the boating enthusiast, but

is also ideal for any demanding environment or ap-

plication 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

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)

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 di-

opter 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.

0 20 60 80

Summary of content (4 pages)

PAGE 1
MARINE 7x50 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-filled compass built in to the viewing optics, compass “swing” stops immediately due to an advanced dampening design. Bearings are defined in easy-to-read precise 1-degree increments, ideal for navigation and locating objects accurately.
PAGE 2
Reticle: 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.
PAGE 3
How to Measure Azimuth Angle: In the binocular, azimuth angle is defined by the horizontal reticle scale. If the size of an object falls within the horizontal scale, select a single point on this scale as the reference, and position this mark on an outside edge of the visible object, and hold the binocular steady. Looking at the opposite outside edge of the object, simply read off the mils as indicated on the scale. (This is the distance from one edge of the object to its other edge - in mils).
PAGE 4
In this example the object is estimated to be 30m in height (H=30). The altitude angle is measured in the reticle at 60 mils (W=60). Simply divide the height by the altitude angle to determine distance. 30/60 = .5 The distance of the object is .5 kilometers from the viewer.