Terminology

Coated Optics

Coatings on lens surfaces reduce light loss and glare due to reflection, resulting in a brighter, higher-contrast image with reduced eyestrain. Lenses are coated with a micro- scopic film of magnesium flouride. More coating leads to better light transmission.

Magnification (Power)

Binoculars and scopes are often referred to by two numbers separated by an "X". For example: 12 x 50mm. The first number is the power or magnification of the lens.With a 12 x 50mm power binocular, the object being viewed appears to be 12 times closer than you would see it with the unaided eye.

Objective Lens Size

The second number in the formula: (12 x 50mm) is the diameter of the objective or front lens in millimeters. The larger the objective lens, the more light enters the binocular, and the brighter the image.

50mm80mm

Types of Coating

Coated:

Fully-Coated:

Multi-Coated:

Fully Multi-Coated:

Exit Pupil

A single layer on at least one lens.

A single layer on all air-to-glass surfaces.

Multiple layers on at least one lens and all surfaces are coated at least once.

Multiple layers on all air-to-glass surfaces.

Prism Glass

Most optical prisms are made from borosilicate (BK-7) glass or barium crown (BAK-4) glass. BAK-4 is higher quality glass yielding brighter images and high edge-sharpness.

Prism Systems

The exit pupil refers to the size of the column of light that exits an eyepiece. The larger the exit pupil, the brighter the image.

To determine the size, divide the objective lens diameter by the magnification. (A 12 x 36mm model has an exit pupil, or usable light, of 3mm.)

Eye Relief

The distance an eyepiece can be held away from the the eye and still present the full field of view. Extended or long eye relief reduces eyestrain and is ideal for eyeglass wearers.

Field of View

Field-of-view is the side-to-side measurement of the circular viewing field or subject area. It is defined by the width in feet or meters of the area visible at 1,000 yards or meters. A wide field-of-view is better for following fast-moving action or scanning for wildlife. Generally, the higher the magnification, the narrower the field-of-view.

XM-050 10 x 50mm BAK-4	262 ft at 1,000 yds
34.0 oz.

The prism system turns what would be an upside-down image right-side up.

PorroRoof

Roof Prism System – The prisms overlap closely, allowing the objective lens- es to line up directly with the eyepiece. 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 System – The objective or front lens is offset from the eye -piece. Porro prisms provide greater depth perception and generally offer a wider field-of-view.

Waterproof / Fog Proof

Some binoculars and scopes are sealed with o-rings and are nitrogen purged

for waterproof and fog proof protection. These models are able to withstand
complete immersion and remain dry inside.	23

XM Series, YK Series, XM-HD Series specifications

Carson Optical has established itself as a key player in the optics industry, providing high-quality binoculars that cater to various needs and preferences. Among their distinguished lines are the XM-HD Series, YK Series, and XM Series, each designed with unique features and technologies that enhance the user experience.

The Carson Optical XM-HD Series stands out for its exceptional high-definition optics. These binoculars incorporate advanced coatings and superior glass quality that deliver bright, clear images even in low-light conditions. The XM-HD Series is constructed with a durable, lightweight body and is fully waterproof and fog-proof, ensuring reliability in various outdoor settings. The ergonomically designed grip allows for comfortable handling, making it ideal for extended viewing sessions.

Incorporating a powerful ED (Extra-low Dispersion) glass, the XM-HD Series significantly reduces chromatic aberration, providing accurate color reproduction and sharper imagery. Additionally, the compact design and roof prism configuration make these binoculars easy to transport, appealing to birdwatchers, nature enthusiasts, and sports fans alike.

The YK Series, on the other hand, emphasizes versatility and affordability without compromising on performance. This series features multi-coated optics that enhance light transmission and deliver vivid colors. The YK binoculars feature a rubber armor coating for added protection against drops and bumps, making them suitable for rugged outdoor activities.

Designed with a wide field of view, the YK Series promotes immersive viewing experiences, perfect for observing wildlife or enjoying open-air sporting events. The series includes various magnification options, allowing users to choose the right pair for their specific needs, whether it be casual viewing or more serious observation.

Lastly, the Carson XM Series offers a blend of functionality and ease of use for both novice and seasoned users. These binoculars come with fully coated optics that provide bright and crisp images, while twist-up eyecups accommodate users with or without glasses. The XM Series is lightweight and compact, making it a practical choice for those on the go.

Equipped with a robust construction, the XM Series ensures durability and reliability across various conditions. The thoughtful design features, such as the non-slip grip and convenient carrying strap, enhance portability and comfort.

In summary, Carson Optical’s XM-HD Series, YK Series, and XM Series each bring distinct advantages to the table. From high-definition capabilities to rugged affordability and user-friendly designs, Carson has crafted binoculars that meet the diverse needs of outdoor enthusiasts and casual observers alike.