8X42mm Outland X

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This Celestron 8 x 42mm Outland X roof prism binocular is for those who want a quality all-purpose binocular in today’s most popular aperture/magnification combination, but don’t want to pay a high price to get that quality. High end binoculars are waterproof and fogproof. So is the Celestron 8x42mm Outland X, which is O-ring sealed and nitrogen purged to shrug off unexpected summer showers and full downpours, just like high-end binoculars. High end binoculars use high grade BaK-4 roof prisms and multi-coated optics for good high contrast images with very good color fidelity. So does the Celestron 8 x 42mm Outland X. Is the Celestron Outland X as good as a very expensive high end roof prism binocular? Not quite. But it comes darn close at only a fraction the price.

Features of this binocular . . .

  • Roof prism optics. H-body roof prism design with internal center focus. High quality BaK-4 prisms for unrestricted light transmission.
  • Multicoated optics. Multilayer antireflection coatings for good light transmission, color fidelity, and image contrast. With a 5.25mm exit pupil and 42mm objective lenses, the 8 x 42mm Outland X is a bright binocular in twilight or low light situations.
  • Waterproof and fogproof. Dry nitrogen filled and O-ring sealed to be waterproof and fogproof in all temperature and climate extremes. Designed to operate reliably in rainforests and deserts alike.
  • Armor. Black rubber armor absorbs noise and the bumps and thumps of everyday use and provides a good grip when wet.
  • Wide field. The field of view is 6.8° (356’ at 800 yards), quite good for a binocular in this power and aperture range.
  • Twist-up eyecups. The rubber-rimmed eyecups extend to block ambient light and increase contrast for those who don’t wear glasses. They retract for eyeglass or sunglass use. Four click stops let you match the individual eyecup height to your eyes. Eye relief is a very good 18mm, for virtually unvignetted viewing for those who must wear eyeglasses when observing.
  • Rainguard and lens covers. A rubber rainguard is standard equipment, to keep eyepieces dry in sudden showers. It can be attached to the binocular neckstrap to hang down out of the way to one side when not in use, without danger of getting lost. Tethered objective lens covers protect the optics during travel or storage. They flip off the optics and hang down under the binocular tubes to stay out of the way when not in use, but can be removed completely if so desired.
  • Close focusing. About two turns of the ribbed rubber focusing knob moves from a good near focus of 13’ out to the horizon and beyond, allowing use in close-in woodland birding.
  • Rotary diopter correction. A variable diopter ring on the right eyepiece allows you to match the binocular optics precisely to your individual eyesight for a sharp image.
  • Tripod adaptable. For extended no-hands observing, a protective cover on the front bridge unscrews, revealing a 1/4"-20 thread hole for mounting the Celestron 8 x 42mm Outland X on an optional photo tripod using an optional tripod adapter.
  • Standard accessories. A one inch wide woven neck strap for comfortable all-day use and a Cordura-style nylon carrying case with both a wide woven shoulder strap and a belt loop for no-hands carrying are standard equipment.

  • 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.
    6.8°
    Field of view 1000 yards:
    356'
    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.
    5.25mm
    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.
    27.56
    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.
    18.33
    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.

    18mm
    Interpupillary Distance:
    56-74 mm
    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
    13'
    Height:
    5.75"
    Armored:
    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.
    Yes
    Weight:
    The weight of this product.
    22 oz.
    Warranty:
    Limited Lifetime
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    • Soft case with belt loop and shoulder strap
    • Wide cloth neck strap
    • Tethered lens covers
    • Eyepiece rainguard
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    Celestron - 8X42mm Outland X

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    Celestron - 8X42mm Outland X
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    Our Product #: C842X
    Manufacturer Product #: 71346
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    This waterproof and fogproof Celestron 8 x 42mm Outland X roof prism binocular, in today’s most popular aperture/magnification combination, has the most popular features and surprisingly big performance at a surprisingly small price . . .





    . . . our 34th year