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Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars

by Nikon
147 customer reviews
| 17 answered questions

List Price: $260.95
Price: $139.99 & FREE Shipping. Details
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Only 14 left in stock (more on the way).
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  • 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
53 new from $139.99 2 used from $129.49
$139.99 & FREE Shipping. Details Only 14 left in stock (more on the way). Ships from and sold by Gift-wrap available.

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Technical Details

Product Description

Product Description

Nikon Action Extreme ATB 10X50 Binocular 7245 Binoculars

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 8x42, 10x42 and 12x42. It is also available in Team REALTREE models with the REALTREE APG HD camouflage pattern.

Technical Specs

Magnification x
Objective Diameter 35
Angular FOV – Real 9.3
Angular FOV – Apparent 59.3
FOV @ 1000 yds 488
Close Focus Distance (ft.)
Exit Pupil (mm)
Relative Brightness 25
Eye Relief (mm)
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)

Additional Action EX Highlights: 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.


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)
= 2 x tan-1 (8 x tan 3.5)
= 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?

No. Brightness may vary even if the exit pupil is the same. This is because the amount of light reaching the viewer's eyes varies according to the number of lens elements and quality of lens/prism coatings. Superior optical design and highquality coating greatly contribute to the brightness of binoculars. Brightness values specified in product brochures, etc. are theoretical ones calculated in the design process. Please note these factors when comparing actual brightness values.

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., 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. 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.

Product Details

  • Product Dimensions: 9.5 x 8.4 x 4.6 inches ; 2.2 pounds
  • Shipping Weight: 3 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B0001HKIK4
  • California residents: Click here for Proposition 65 warning.
  • Item model number: 7245
  • Batteries 1 Lithium ion batteries required.
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (147 customer reviews)
  • Amazon Best Sellers Rank: #304 in Camera & Photo (See Top 100 in Camera & Photo)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
  • Date first available at October 2, 2001

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

105 of 112 people found the following review helpful By Birdman on January 6, 2008
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.
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61 of 64 people found the following review helpful By DLH TOP 500 REVIEWERVINE VOICE on April 1, 2009
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.

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.

Optical coatings could be better.
Slightly heavy.
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26 of 26 people found the following review helpful By Edward C. on May 12, 2007
Verified Purchase
I bought the Nikon Action 10x50 binoculars to replace an old "no name brand" pair my father gave me 30 years ago. I didn't use the old ones regularly until we moved to the Gulf coast. The old binoculars were in sad shape so I ordered the Nikon. Wow was I surprised. Bright, clear view, true color, I didn't know binoculars could work so well. The EX Extreme is easy to focus, easy to adjust and light enough to carry around all day. The case that comes with them doesn't provide much protection I'll be looking for something better for travel. I'm looking forward to taking them on my next sailing trip.
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18 of 19 people found the following review helpful By Musicman44mag on February 29, 2012
Verified Purchase
Wow, what a difference in todays binoculars. My 6x32 Bushnell and my 7x35 Tasco that are both over twenty years old don't hold a candle to this one and I don't think they should but wow, what a differnce. I purchased the 7245 model but wanted the 8221. The reason why I didn't get the 8221 is because it had less reviews and had a few 1, 2, 3 scores. The 7245 had nothing below a 3 score and there were only a three of them. I listed their complaints below. In addition, the 7245 recieved the best viewer award.

One person stated that the lens cover over the big lenses were to loose and could fall off to easy. Mine snap in place and you can hear and feel the snap. Others have complained about the eye cups being cheap. I found they were firm and solid but the rubber to me feels a little hard and could be softer. I found no problem keeping the object in sight holding the glass free hand so the 10 magnification factor isn't a problem and glad I took these rather than the 8x42 though with the excellent reviews it was tempting. One person wrote that they bought the 8 power for their brother and didn't want to buy two of the same thing but was concerned that with the 10 power the view would be shakey. He stated that he was glad he went with the 10x42 and had no problems. I took his word for it and I am glad I did but I went one better by going with the 50mm lens instead. Boy if he would have gotten these I bet he would have been even more shocked with the view.

The 7245 binocular is somewhat heavy but it is solid in construction and has a beautifull clear view. The pad on the nice neck strap might help make up some of the differnce in discomfort around your neck.
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14 of 15 people found the following review helpful By M. Corrigan on January 30, 2009
I have a fair amount of experience with good optics as an avid amateur astronomer. I have a Meade 10" SCT GPS telescope that is used on a regular basis, as well as an 8" reflector scope and really appreciate quality optics. I needed a pair of relatively decent binoculars to use around the rural property I live on.

After extensive research and shopping, I settled on the NIKON Action Extreme 10 x 50. The waterproofing was a nice, and important bonus. However, the real pay off is in the bright, pure image that these glasses deliver. Very little edge distortion, practically no corona, excellent color transmission, and very easy to hold. Focus is smooth and sure. The diopter adjustment actually works (as opposed to not working at all on lesser glasses), and again the images are crisp and rival much more expensive binos. Great field of view and good eye relief round out the long list of attributes for these binoculars.

One very minor complaint concerns the objective lens covers. You'll have to modify them somewhat to make a strap system to permanently attach them to the bino strap. Nikon includes some slots on the covers to temporarily attach the to the strap, but it's not a permanent solution.

All in all, you really should buy these. Stay away from anything less.
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Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars
This item: Nikon 7245 Action Ex Extreme 10 X 50 mm All Terrain Binoculars
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