10X42mm Premier

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This newest version of Nikon’s renowned 10 x 42mm Premier has truly outstanding high power optics, with excellent resolution, contrast, and color fidelity. Specially designed eyepieces and field-flattening lenses provide a very flat field from edge to edge and very low astigmatism. The image quality is typically Nikon – truly superb.

Its premium H-body roof prism optics use ecologically-safe glass components made without lead or arsenic, as is the case with conventional binoculars. All air-to-glass surfaces are fully multicoated with proprietary Nikon antireflection materials for the highest possible light transmission and contrast. The roof prisms use high index BaK4 glass for superb light transmission. The prisms’ mirrored surfaces are silver coated for superior reflectivity. In addition, phase-correcting coatings on the prisms make a visible difference when looking at backlit subjects in early morning or late afternoon, where the coatings reveal substantially more detail and color in the shadowed areas than can be seen through optics without phase coatings.

The strong and lightweight magnesium alloy body is nitrogen-filled and O-ring sealed to be fogproof and fully waterproof. This allows the binocular to survive sudden showers as well as full monsoon conditions. The inert nitrogen filling also ensures a lifetime of bright, tarnish-free performance from the silver prism coatings.

The body is fully clad in protective black rubber armor. Textured gripping surfaces and thumb rests in the armor provide a secure grip in wet weather, and a more comfortable grip in hot or cold climates.

The 10 x 42mm has very fast focusing, moving quickly and smoothly from the horizon to a 9.8’ close focus in only a hair more than one turn of the large ribbed rubber center focus knob. There is a continuously variable rotary diopter adjustment collar on the right eyepiece to match the optics to the user’s individual eyesight. Pull the collar up to adjust the diopter, then push it down again to lock the correction in place so you can’t accidentally change the diopter setting during routine binocular use. Four-position twist up and lock in place rubber-rimmed eyecups and a quite long 18mm eye relief allow eyeglass wearers to see a virtually unvignetted field.

The 10 x 42mm comes with a soft carrying case with a durable magnetic catch that keeps the case securely closed when traveling, but opens easily for quick access to your binocular when a life bird happens by. Individual objective lens covers are supplied for optics protection during storage. The eyepiece rainguard is oversized to be easily removable, even when wearing gloves or mittens. It has loops to let you tether it to the 1-1/8” wide binocular neck strap so it can’t get lost in the field.

Optically very sharp and bright, the Premier has superbly accurate color fidelity and excellent contrast. Its astigmatism is very low, as is its distortion and curvature of field. The eyepiece design and a special field-flattening lens make the images look virtually as crisp at the edges of the field as they do in the center. All in all, an optically superb high power binocular that you will be proud to call your own for many years to come. It’s one that is unlikely to be surpassed in performance for as long as you own it.

Optical Type:
The optical design of a binocular or spotting scope. A binocular can be either a porro prism (whose objective lenses are off-set and spaced further apart than the eyepieces) or a roof prism (whose objective lenses are in line with the eyepieces). A spotting scope can be either a porro prism or roof prism refractor or a catadioptric (a combination of lenses, mirrors, and prisms).
Roof Prism
Field of view:
The field of view (FOV) is the amount of observable world one can see at any given moment.
Field of view 1000 yards:
Exit Pupil:
The circular image or beam of light formed by the eyepiece of a telescope. To take full advantage of a scope's light-gathering capacity, the diameter of an eyepiece exit pupil should be no larger than the 7mm diameter of your eye's dark-adapted pupil, so that all of the light collected by the telescope enters your eye. (The eyepiece exit pupil diameter is found by dividing the eyepiece focal length by the telescope focal ratio.) Your eye's ability to dilate declines with increasing age (to a dark-adapted pupil of about 5mm by age 50 or so). For those in this age group, eyepieces with exit pupils larger than their eyes can dilate to simply waste their telescope's light-gathering capacity, as some of the scope's light will fall on their iris instead of entering their eye.
Relative Brightness:
A number used to compare the brightness of binoculars or spotting scopes of similar magnification. The relative brightness is determined by squaring the diameter of the exit pupil. The larger the relative brightness number, the brighter the image.
Twilight Factor:
A number used to compare the effectiveness of binoculars or spotting scopes used in low light. The twilight factor is found by multiplying the size of the objective lens (in mm) by the magnification and then finding the square root of that result. The larger the twilight factor, the more detail you can see in low light. A twilight factor of 17 or better if usually required for reasonable low light use.
Eye Relief:
Eye relief is the distance from the last surface of the eye lens of an eyepiece to the plane behind the eyepiece where all the light rays of the exit pupil come to a focus and the circular image is formed, sometimes called the “Ramsden Disk.” This is where your eye should be positioned to see the full field of view of the eyepiece. If you must wear glasses because of astigmatism, you’ll usually need at least 15mm of eye relief or longer if you want to see the full field of view with your glasses on.

A note on our eye relief figures: Quite often, our eye relief figures will differ from those of the manufacturer. This is because we measure the “usable” eye relief, while the manufacturers specify their usually-longer (but technically correct) “designed” eye relief.

The eye lens of the eyepiece is normally recessed below the rubber eyeguard or rubber rim of the eyepiece to keep the lens from being scratched during use. An eyepiece might have a “designed” eye relief of 15mm (and the eye relief will truly measure 15mm from the eye lens to where the image forms). However, if the eye lens is recessed 3mm below the eye guard, the Ramsden Disk forms only 12mm above the eyepiece body (the 15mm “designed” eye relief, less the 3mm of eye relief made unusable by having the eye lens recessed into the body of the eyepiece). This “usable” eye relief of 12mm (measured from the rolled-down eyeguard – the closest point you can get your eye to the eye lens – to where the image forms) is the eye relief figure we would measure and list in this website.

Why is it important to list the “usable” eye relief? For those people who don’t wear eyeglasses while observing, a few mm difference between the eye relief they expect from the manufacturer’s literature and the shorter eye relief they actually get in real life doesn’t mean a lot. They can simply move a little closer to the eyepiece to see the full field, and never realize that the eye relief is a little shorter than they expected. However, some people must wear eyeglasses while observing, because of severe astigmatism. These observers can’t move closer to the eyepiece if the eye relief is shorter than expected because their glasses get in the way. For these people, the real life “usable” eye relief is more important than the technically correct but sometimes not fully usable “designed” eye relief. We measure and list the actual usable eye relief so that people in the real world can pick the eyepieces that will work best for them.

Interpupillary Distance:
Close Focus:
How close you can get to an object and still see a sharp image of it in your binocular or spotting scope is called the “close” or “near” focus
A binocular or spotting scope whose body is clad in rubber or polyurethane armor is said to be armored. Armor can be applied for looks, a better grip, noise-proofing, etc. An armored body does not guarantee that a binocular or spotting scope is waterproof, although most waterproof optics are armored.
The weight of this product.
27.9 oz.
25 years
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  • Soft carrying case
  • Objective lens covers
  • Eyepiece rainguard
  • Neck strap
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Nikon - 10X42mm Premier

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Nikon - 10X42mm Premier
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Our Product #: N1042P
Manufacturer Product #: 7536
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If you want a top-quality 10x binocular, but don’t want to spend $2000+ to get it, maybe Nikon’s $800 less-expensive 10 x 42mm Premier is the binocular for you . . .

. . . our 35th year