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Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars
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| List Price: | $260.95 |
| Price: | $142.30 & eligible for FREE Super Saver Shipping on orders over $25. Details |
Availability: Usually ships in 24 hours
Ships from and sold by Amazon.com
11 new or used available from $139.95
Average customer review:
(73 customer reviews)
Product Description
New Nikon 7245 10X50 Action Extreme Hunting Binoculars.Includes deluxe case, strap, instructions, and box.The Nikon Action Extreme binoculars feature an all-metal chassis with lens fittings housed in a tough, lightweight polycarbonate body shell. Like all Nikon All Terrain Binoculars, the EX is nitrogen-filled and O-ring sealed for total waterproof, fogproof and shockproof performance in any environment. The binocular bodies are ergonomically shaped, tripod adaptable and are rubber coated for a non-slip grip, whether wet or dry. The new Extreme ATB offerings utilize high-resolution lenses and prism systems crafted from Nikons exclusive Eco Glass, which is made without the use of arsenic or lead. This lens system provides an extremely clear, distortion-free image over the entire field of view. The lens elements each incorporate multi-layered anti-reflective coatings formulated to deliver optimum brightness, high contrast, true color rendition and flare-free viewing in most lighting conditions. The Extreme series binoculars each feature a unique, click-stop eyecup design that not only delivers long eye relief, but also allows for variable eye relief that is customizable to the users own eyes and eyeglasses. The binoculars are central focus with a diopter control to correct for normal right/left eye vision imbalance.
Product Details
- Amazon Sales Rank: #717 in Camera & Photo
- Size: 10x50
- Brand: Nikon
- Model: 7245
- Number of items: 1
- Dimensions: 4.60" h x 8.40" w x 9.50" l, 2.25 pounds
Features
- Waterproof, fogproof, and shockproof performance
- All-metal chassis in lightweight polycarbonate shell
- Rubber-coated body for firm, non-slip grip
- Magnification: 10x
- Objective lens: 50mm
Editorial Reviews
From the Manufacturer
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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 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 8x42, 10x42 and 12x42. It is also available in Team REALTREE models with 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 |
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Additional Action EX Highlights:
- BaK 4 High Index Roof Prisms
- Tripod adaptable
- Long eye relief for eyeglass wearers
Warranty InformationNikon 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)
= 52.1°
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 8x42 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.
Do binoculars with the same exit pupil offer the same brightness?
Prisms
Prisms are what let you see a correctly oriented image when you look through a pair of binoculars. There are two types of prisms in common use, Porro prisms and roof prisms.
Roof prisms are essentially in line inside the optical tubes, and make for a more compact set of binoculars. Roof prism binoculars have straight tubes (the front/objective lens is in line with the rear/ocular lens), and are therefore more compact, an important consideration for the sportsman. They usually have two pivot points between the tubes, and are more difficult to adjust to the spacing of your 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 in the high price class. Do not attempt to economize on roof prism binoculars.
Porro prism binoculars can be identified by their offset tubes; the objective lens is not in line with the ocular lens. The front lenses are usually closer together than the rear lenses, but the reverse can also be true, particularly in compact models. The Porro prism design is usually optically superior to the roof prism design, especially in medium priced class binoculars. Porro prism binoculars have a single pivot between the two halves of the binocular, and are therefore easy to adjust for the distance between your eyes.
Like roof prisms, not all Porro prisms are created equal. BAK-4 prisms are the best; they are made of superior optical glass that produces clearer images. These are what you want in your binoculars. BK-7 prisms are also used, usually in lower priced binoculars. These are satisfactory, but they are inferior to the BAK-4 prisms. Some manufacturers will not tell you what kind of prisms they use, usually because they 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 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 coatingUsing 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 surfaceThe 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. |
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.
Customer Reviews
Most helpful customer reviews
43 of 46 people found the following review helpful.
Superb Optics, Comfortable Depth of Field. Excellent for Raptors, Shorebirds
By Birdman
I took the plunge on 10x50's after reading a compelling article on the Cornell Ornithology website.
These Nikon Action EX 10x50 binocs are unusually well-crafted for a "low end" product. Their optics are sharp and bright, even at dawn or dusk. Their eye fatigue index approaches 18. Their ergonomics and controls are rugged and smooth. Most of all, the wiggle you'd expect from 10-power binocs are rarely a problem here because the frame is lighter than most products in this price-range. Indeed, without a harness or monopod, you can watch a Bald Eagle fish the surface of a river for a quarter-mile and not miss any of the action.
While I use these primarily to view raptors at distances of 500+ feet, they focus very clearly at 27.5 feet, too. Whatever the distance, the view is bright, the colors generally vivid and the detail superb.
That is not to say that Leica wouldn't produce a superior product; but at a fraction of the price, nearly 50% off retail, they are wonderful. Keep a pair of 8x42 binoculars on-hand, especially if songbirds are your passion; but if you expect to do some long-distance viewing, these Nikons are a sensible buy.
19 of 19 people found the following review helpful.
Good Service, Good Product
By S. S. Sandor
Amazon offered the lowest price and the service exceeded my expectation. Have used them with excellent results at night observing the moon and stars. Much, much better than the much less expensive 10X50 I have been using. Also did some bird watching and found the brightness and color accurracy also much better than the cheaper pair. Another pleasant surprise was the Nikon allowed viewing at a much closer distance really making their range for viewing much more practical. The weight is about the same as the cheaper pair and I can only wish they were half the weight but this weight seems to be about the norm for this size pair. Plan to take them with me on all hikes and trips. They seem to be very well constructed and the rubberized coating makes them easy to use and comfortable. Recommend them to anyone looking for a pair in this size range.
21 of 22 people found the following review helpful.
Very good in this price range. Not perfect.
By D. Hentze
Since it looks like Amazon is consolidating several of the Nikon Binocular reviews into one, this review is for the Nikon Action Extreme (#7245) 10x50 Binoculars. I wish Amazon didn't do this since the specs are much different between the "Action" and "Action Extreme" models. ...Anyway, the Action Extremes are very good binoculars. They are not the best you can buy, but you can buy much worse. Actually, there is only one thing that keeps me from giving the 7245's a 5 Star Rating. The optical coatings could be better. The binoculars suffer from some internal reflections when used under difficult lighting situations, such as viewing a bright object like a full moon. The optical coatings are better than your average binoculars, but not as good as some other models. Most of the better ones will cost much more though. During normal circumstances though, the 7245's shine. They have excellent edge to edge sharpness and clarity. I have no problem seeing very fine detail at far distances. All in all, I give them 4.5 stars.
Pros:
Moderately priced.
Waterproof and fogproof.
Rugged construction.
Excellent performance under most conditions.
Long eye relief (17.2mm).
Good accessories.
25 year limited no fault warranty.
Cons:
Optical coatings could be better.
Slightly heavy.
