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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 very package that is comfortable to carry all day. With rugged rubber armor for added durability plus a firm grip even inside the worst conditions, Nikon guarantees every ATB to get 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 obtainable in 8x42, 10x42 and 12x42. It is also for sale in Team REALTREE models with all the REALTREE APG HD camouflage pattern.

Technical Specs

Model
7x35
8x40
7x50
10x50
12x50
16x50
Magnification x
7
8
7
10
12
16
Objective Diameter 35
40
50
50
50
50
Angular FOV – Real 9.3
8.2
6.4
6.5
5.5
3.5
Angular FOV – Apparent 59.3
59.7
42.7
59.2
59.9
52.1
FOV @ 1000 yds 488
430
335
341
288
183
Close Focus Distance (ft.)
16.4
16.4
23
23
23
23
Exit Pupil (mm)
5
5
7.1
5
4.2
3.1
Relative Brightness 25
25
50.4
25
17.6
9.6
Eye Relief (mm)
17.3
17.2
17.1
17.2
16.1
17.8
Size (L&W) (in)
4.7 x 7.2
5.4 x 7.4
7 x 7.7
7 x 7.7
7 x 7.7 7 x 7.7
Weight (oz)
28.2
30.2
35.3
36
36.9
36.7

Additional Action EX Highlights:
BaK 4 High Index Roof Prisms
Tripod adaptable
Long eye relief for eyeglass wearers

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 protected by our 25 Year Limited Warranty, Nikon will repair or change it (even it had been your fault) for $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 from the visible field, seen without moving the binoculars, measured in the central point of the objective lens. The larger the worth is, the wider the viewfield available. For example, binoculars using a wider field of view are advantageous for locating fast-moving wild birds inside viewfield. And also this applies to find small nebulas or a cluster of stars in astronomical observations.

Apparent field of view
Apparent field of view could be the angle in the magnified field if you examine binoculars.
The larger the apparent field of view is, the wider the joy of view you is capable of see even at high magnifications.

With the traditional method used previously, the apparent field of view was calculated by multiplying the actual field of view from 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 actually based about the ISO 14132-1:2002 standard, and obtained with 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 named wide field of view.)

For example, the apparent field of take a peek at 8x binoculars having an 7.0°real field of view can be as follows:
2ω' = 2 x tan-1 (r x tan ω)
= 2 x tan-1 (8 x tan 3.5)
= 52.1°

Relative Brightness
Relative brightness value is obtained by squaring the diameter with the exit pupil. The greater the relative brightness is, the brighter the style will be. With 8x42 binoculars, the brightness is (42÷8)2= 28.1. What this means is when the magnification is the same, the larger the effective diameter in the objective lens, the brighter the style will be.

Do binoculars using the same exit pupil offer a similar brightness?

No. Brightness can vary even when the exit pupil may be the same. This is since the amount of sunshine reaching the viewer's eyes varies according towards the number of lens elements and excellence of lens/prism coatings. Superior optical design and highquality coating greatly contribute towards the brightness of binoculars. Brightness values specified by product brochures, etc. are theoretical ones calculated inside design process. Please note these factors when comparing actual brightness values.

Prisms
Prisms are what let the thing is a correctly oriented image if you look by strategy for a set of two binoculars. You can find 2 kinds of prisms in common use, Porro prisms and roof prisms.

Roof prisms are essentially in line within the optical tubes, and make for the more compact set of binoculars. Roof prism binoculars have straight tubes (the front/objective lens is in line with the rear/ocular lens), and so are therefore more compact, an important consideration for your sportsman. They will often have two pivot points involving the tubes, and therefore are more hard to adjust to the spacing of one's eyes. Roof prisms can give an optical image equal to the best Porro prisms, but for technical reasons they usually do not. To be really good, roof prism binoculars have to be inside high price class. Do not try and economize on roof prism binoculars.

Porro prism binoculars can be recognized by their offset tubes; the aim lens just isn't in line with the ocular lens. The front lenses are generally closer together compared to rear lenses, nevertheless the reverse can also be true, particularly in compact models. The Porro prism design is generally optically superior towards the roof prism design, particularly in medium priced class binoculars. Porro prism binoculars have a single pivot between the two halves in the binocular, and therefore are therefore simple to adjust for the distance involving the eyes.

Like roof prisms, not all Porro prisms are manufactured equal. BAK-4 prisms include the best; they may be manufactured from superior optical glass that creates clearer images. These are whatever you want within your binoculars. BK-7 prisms may also be used, usually in more affordable binoculars. They are satisfactory, nevertheless they are inferior on the BAK-4 prisms. Some manufacturers will not inform you what sort of prisms they use, usually because these are of inferior quality. BAK-4 prisms show a truer round, which translates to better light transmission and edge-to-edge sharpness

Prism Coatings
Multilayer coating can be applied to prisms to raise transmittance. A roof prism system has one surface that will not feature total internal reflection, so vapor deposition with metals, etc. must be utilized to boost the reflectivity of the 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 amount of objective lens and eyepiece lens, and forms of coatings.
Metal-vaporized, high-reflectivity prism coating
Using vacuum-vaporization technology, metallic material like aluminum or silver is used to the reverse side of your prism surface that just isn't totally reflective. This raises the reflectivity with 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 over 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 additionally by the total optical system such as the number of lenses superiority coatings.
Phase-correction coating
A roof (Dach) surface could cause phase shift of sunshine that affects image resolution. This phenomenon is caused by phase differences arising from total light reflection over a roof (Dach) surface also it can occur with a perfectly processed prism. Phase-correction coating is applied for the surface to minimize loss of resolution, ensuring high-contrast images.

Twilight Factor
The factor that has the best influence on resolution or image detail, is going to be dependent upon the amount of sunshine available during time of observation. During daylight hours, when your skills pupil size will probably be just about 2 to 3mm, magnification is planning to be the principal aspect in image resolution. At night, using the eye pupil dilated to 6 to 8mm, aperture size could be the controlling factor. In twilight conditions both of these factors control resolution effectiveness and also the twilight factor is the term that compares binocular performance under these conditions.

The twilight factor is calculated by using the square root from the product of the magnification along with the aperture. The higher the twilight factor, the higher the resolution from the binocular when observing under dim light conditions. For example, a 10 X 40 (twilight factor 20) would effectively resolve better under these conditions when in comparison to a 7 X 35 (twilight factor 15.4) even though the 10 X 40 features a smaller exit pupil. Remember, however, that the twilight factor does not take under consideration the transmittance or quality of the optical system.

Nikon's Action Extreme series offer a good deal of features that is gonna be appreciated by people who enjoy the view given by classically-styled porro prism units. Following the enormously popular Action series, Nikon has made significant improvements. The group still retains the high-refraction prisms with their wide viewing fields, and every model features a tripod adapter threading for simple extended glassing from a stationary position.



Product Features
Please note: This supplier will be closed on 11/24, 11/25, 12/26 for the holidays. The shipping cut off is UPS's cut off of 12/15 to try and have the products delivered by Christmas. Note: Please check your state regulations, hunting regulations, etc before placing an order with this supplier. Your order may be canceled if the item is not able to be shipped to your state due to their regulations.