About The Ranging Reticle

There are vertical and horizontal lines on the reticle (Fig. 1). Each minor division on both vertical and horizontal lines represents 5 mils and each major division represents 10 mils (one circularity angle=6400 mils. (one circular angle equals 1 degree of angle, equals one minute of angle, equals 60 seconds of angle, and equals 6400 mils.)

How to use the reticle to measure azimuth:

Azimuth of a body is the arc of the horizon intercepted between the north or south point and the foot of the vertical circle passing through the body. It is reckoned in degrees from either the north or south point clockwise entirely around the horizon. Azimuth of a current is the direction toward which it is flowing, and is usually reckoned from the north point.

Fig. 1

Model 280751

Model 280750

A mil’s reticle can measure the azimuth angle, upper and lower angle, distance and size of an object or target. The visual distance reticle lines can measure the distance of normal object easily on the basis that the object to be measured is at least 2 meters (6 feet) in height.

How to measure the azimuth angle:

The azimuth angle is the angle included between two objects to be measured at the horizontal direction of the binocular. (or two ends of one object at horizontal direction)

When the azimuth of two targets is smaller than the azimuth measuring range (-50~+50 mils) inside the binoculars, aim the scale line at one end of the reticle at the target then read the value of the scale at which another target was located on the reticle. The value is the measured azimuth mil. As shown in Fig. 2, the azimuth of the target (tank) is 0-20 mils. The azimuth between the targets (p-p) is: (280751) 0-65 mils / (280750) 0-80 mils.

Fig. 2

Model 280751

Model 280750

When the azimuth of two targets is bigger than azimuth measuring range (-50~+50 mils) inside the binoculars, an area on the targets can be selected to make the necessary estimated measurements in a step by step fashion. The sum of the value from each step is used to obtain the measured azimuth. As shown in fig 3, the azimuth of target (cruiser) is 130 mils (60+70=130).

When the azimuth of a target is longer than the azimuth measuring range (-50~+50 mils) inside the binoculars, you can visually calculate the total azimuth mils by using the vertical line on the reticle by placing the image in a position where the vertical line splits the image. You will need to take two image readings. Mentally, consider the horizontal with three reference points. Point A is the 50 mil point on the far left side. Point B is where the vertical line intersects the horizontal line. Point C is the far right 50 mil

Page 1 Page 3
Page 2
Image 2
Bushnell 280750 About The Ranging Reticle, How to use the reticle to measure azimuth, How to measure the azimuth angle
Page 1 Page 3

280751, 280750 specifications

The Bushnell 280750 and 280751 represent a significant advancement in the field of optics, offering exceptional performance for outdoor enthusiasts, hunters, and bird watchers alike. These binoculars are designed with a range of innovative features and technologies that cater to both casual users and those who demand professional-grade equipment.

One of the standout features of the Bushnell 280750 is its powerful magnification capabilities. With a 10x magnification and a 42mm objective lens diameter, this model provides bright and clear images, allowing users to observe distant subjects with precision and detail. The wide field of view further enhances the viewing experience, making it easier to track moving objects, be it wildlife in action or athletes during a sporting event.

In contrast, the Bushnell 280751 offers an even more powerful 12x magnification, which allows for close-up views of faraway subjects. This model, too, boasts a 42mm objective lens, ensuring that it captures ample light to maintain image brightness and clarity in various lighting conditions. Both models feature multi-coated optics that enhance light transmission, resulting in sharper images and vivid colors even in low-light environments.

Durability is a key characteristic of the Bushnell 280750 and 280751. Both models are housed in a rugged, shock-absorbing outer shell that can withstand the rigors of outdoor use. The waterproof and fog-proof design ensures that these binoculars can perform reliably in challenging weather conditions, making them the ideal companion for adventurers exploring diverse environments.

Another notable technology integrated into these binoculars is the use of BaK-4 prisms. This optical technology enhances image quality by providing a bright and clear view across the entire field of vision. The ergonomic design of the Bushnell 280750 and 280751 with non-slip rubber armor offers a comfortable grip, reducing the chances of drops and providing added protection against the elements.

In summary, the Bushnell 280750 and 280751 binoculars are designed for those who prioritize performance, durability, and clarity in their optical instruments. With impressive magnification options, advanced optical technologies, rugged construction, and a user-friendly design, these binoculars are sure to satisfy the demands of outdoor enthusiasts at any level. Whether for birdwatching, hunting, or simply exploring the beauty of the great outdoors, both models provide a reliable and enjoyable viewing experience.
Top Page Image Contents