The MONARCH 5 8×56 combines the superiority of Nikon’s ED (extra-low dispersion) Glass with Fully Multicoated Eco-Glass Lenses to deliver images that are extremely lifelike in color and detail. The MONARCH 5 also features a lightweight design, turn-and-slide rubber eyecups and long eye relief, making this binocular comfortable and easy to use.

Product description

A roof prism binocular with a hearty feature-set that’s easy on the wallet and the environment? Yes! – the Monarch ATB 8×42 from Nikon is here – it’s layered with assets, and it won’t break the bank when you bring one home.

Nikon’s proprietary lead and arsenic free optical-glass formula, known as Eco-Glass, is used for all lenses and prisms in this fine Monarch binocular. All of the air-to-glass surfaces are fully multicoated to ensure maximum light transmission, sharpness, and contrast. The roof prisms are finished with a dielectric coating that enhances the efficiency of the optical system to near perfection. This easy-to-handle optic is fully waterproof and fogproof, and a tactile rubberized exterior ensures a secure grip at all times. The centered focus knob is fast, accurate, and easy to use. A pair of multi-setting click-stop eyecups and a notable 15.5 mm of eye relief allow you to tailor the binocular to suit your needs – whether you’re wearing glasses or not. Sleek lightweight form factor – excellent ergonomics, easy to carry, durable Center focus knob – fast full-range of focus for quick viewing. Click stop eyecups – clear comfortable view with/without sun/eyeglasses Specifications Prism Type – Roof Magnification – 8x Objective Lens Diameter – 42 mm Angle of View – 6.3 Field-of-View – 330′ @ 1000 yd / 110 m @ 1000 m Minimum Focus Distance – 8.2′ / 2.5 m Exit Pupil Diameter – 5.3 mm Eye Relief – 19.6 mm Interpupillary Adjustment – 56 – 72mm / 2.2 – 2.83 Focus Type – Center Weatherproofing – Water and fogproof Dimensions (WxHxD) – 5 x 2.4 x 5.7 / 127 x 60.96 x 144.78mm Weight – 21.5 oz / 609.53g

From the Manufacturer

The Monarch ATB 42mm with Dielectric High-Reflective Multilayer Prism Coating binocular features brighter, sharper colors, crisp and drastically improved low-light performance. A new body style provides unparalleled strength and ruggedness in a package that is comfortable to carry all day. With rugged rubber armor for added durability and a firm grip even in the worst conditions, Nikon guarantees every ATB to be 100% waterproof and fogproof, each is backed by Nikon’s 25 Year Limited Warranty and No-Fault Repair/Replacement Policy. The new Monarch ATB 42mm with Dielectric High-Reflective Multilayer Prism Coating binocular is available in 8×42, 10×42 and 12×42. It is also available in Team REALTREE models with the REALTREE APG HD camouflage pattern.

Technical Specs

• Focusing System – Center Focus
• Magnification – 8x
• Objective Diameter – 42mm
• Angular FOV – Real – 6.3°
• Angular FOV – Apparent – 47.5°
• FOV @ 1000 yds – 330 ft
• Close Focus Distance – 8.2 ft
• Exit Pupil – 5.3mm
• Relative Brightness – 28.1
• Eye Relief – 19.6
• Size (L&W) – 5.7 x 5.1
• Weight – 21.5
• Waterproof/Fogproof – Yes
• Prism coating – Dielectric

Dielectric High-Reflective Coating – This technique provides almost the same brightness as that perceived by the naked eye

Multi-Setting Click Stop Eyecups – provides fast, effective eye relief

Fully Multicoated Lenses

Rugged Rubber Armor for Added Durability

Warranty Information

Nikon is dedicated to quality, performance and total customer satisfaction. If your Nikon binocular, Spotting Scope or Fieldscope requires service or repair not covered by our 25 Year Limited Warranty, Nikon will repair or replace it (even it was your fault) for just $10, plus return shipping and handling.
Excludes – StabilEyes, Laser Rangefinders and Spotting Scope/Fieldscope eyepieces.

FAQ’s

Real field of view
Real field of view is the angle of the visible field, seen without moving the binoculars, measured from the central point of the objective lens. The larger the value is, the wider the viewfield available. For example, binoculars with a wider field of view are advantageous for locating fast-moving wild birds within the viewfield. This also applies for finding small nebulas or a cluster of stars in astronomical observations.

Apparent field of view
Apparent field of view is the angle of the magnified field when you look through binoculars.
The larger the apparent field of view is, the wider the field of view you can see even at high magnifications.

With the conventional method used previously, the apparent field of view was calculated by multiplying the real field of view by the binocular magnification. (With this formula, apparent field of view wider than 65˚ is called wide field of view.)

After revision, Nikon’s figures are now based on the ISO 14132-1:2002 standard, and obtained by the following formula:

tan ω’ = τ x tan ω
Apparent field of view: 2ω’
Real field of view: 2ω
Magnification: τ
(With this formula, apparent field of view wider than 60° is called wide field of view.)

For example, the apparent field of view of 8x binoculars with an 7.0°real field of view is as follows:
2ω’ = 2 x tan^-1 (r x tan ω)

Relative Brightness
Relative brightness value is obtained by squaring the diameter of the exit pupil. The greater the relative brightness is, the brighter the image will be. With 8×42 binoculars, the brightness is (42÷8)2= 28.1. This means that if the magnification is the same, the larger the effective diameter of the objective lens, the brighter the image will be.

Prism Coatings
Multilayer coating is also applied to prisms to raise transmittance. A roof prism system has one surface that does not feature total internal reflection, so vapor deposition with metals, etc. must be used to raise the reflectivity of this surface. Also, phase-correction coating on roof surface ensures high-contrast images.
*Binoculars’ brightness and contrast are affected by not only prism coatings, but also the number of objective lens and eyepiece lens, and types of coatings.

Metal-vaporized, high-reflectivity prism coating Using vacuum-vaporization technology, metallic material such as aluminum or silver is applied to the reverse side of a prism surface that is not totally reflective. This raises the reflectivity of the prism mirror surface. Dielectric high-reflective multilayer prism coating This coating features reflectance that exceeds 99%. By utilizing light interference, this coating assures high reflectivity across the full visible range, and ensures high color reproducibility.

Reflectance characteristics of prism coatings on mirror surface The horizontal axis indicates the wavelength of light. The vertical axis indicates the reflectance of light. Binoculars’ brightness is determined not only by the reflective mirror, but also by the total optical system such as the number of lenses and quality of coatings.

Phase-correction coating
A roof (Dach) surface can cause phase shift of light that affects image resolution. This phenomenon is caused by phase differences arising from total light reflection on a roof (Dach) surface and it can occur with even a perfectly processed prism. Phase-correction coating is applied to the surface to minimize loss of resolution, ensuring high-contrast images.

Twilight Factor
The factor that has the greatest impact on resolution or image detail, will be dependent upon the amount of light available during the time of observation. During daylight hours, when your eye pupil size will be only about 2 to 3mm, magnification will be the principal factor in image resolution. At night, with the eye pupil dilated to 6 to 8mm, aperture size is the controlling factor. In twilight conditions both of these factors control resolution effectiveness and the twilight factor is the term that compares binocular performance under these conditions.

The twilight factor is calculated by taking the square root of the product of the magnification and the aperture. The higher the twilight factor, the better the resolution of the binocular when observing under dim light conditions. For example, a 10 X 40 (twilight factor 20) would effectively resolve better under these conditions than a 7 X 35 (twilight factor 15.4) even though the 10 X 40 has a smaller exit pupil. Remember, however, that the twilight factor does not take into account the transmittance or quality of the optical system.