10X30mm T* Conquest

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The optics of this high power Zeiss 10 x 30mm Conquest are fully multicoated with famous Zeiss T* (T Star) top-of-the-line multicoatings, arguably the best high transmission multicoatings system available. Despite the high power and relatively small size of its 30mm objectives, the bright images of the high transmission T* multicoatings might easily fool you into thinking the Conquest is a considerably larger aperture binocular – but its 18 ounce weight will assure you it’s not.

The Conquest’s costly BaK-4 roof prisms are phase coated (a Zeiss innovation) for outstanding color fidelity. The images are bright and sharp, with excellent resolution. The field is respectably flat, with minimal chromatic aberration and relatively minor astigmatism. Its view is easy on the eyes during extended observing sessions.

The Conquest is a surprisingly good performer across a wide range of observing conditions, bright sunlight and dim twilight alike.

Features of this binocular . . .

  • Roof prism optics. H-body roof prism design with internal center focus. BaK-4 Pechan prisms for high light transmission. The 5.25” length of its compact body (5.6” with the eyecups extended) makes it easy to handle, particularly for people with smaller hands, and its very light 18 ounce weight won’t weigh you down during all-day birding. While comfortably light, the 10 x 30mm Conquest is not so light as to emphasize the minor hand tremors often visible in those among us who are not as young and steady as we once were. This Conquest is one high power binocular that virtually anyone can use successfully.
  • Fully multicoated optics. The optics are fully multicoated on all air-to-glass surfaces with high transmission Zeiss T* antireflection materials for very high light transmission, high contrast, and natural color response.
  • Phase-coated prisms. The phase coatings on the BaK-4 roof prisms eliminate the natural phase shift inherent in all roof prism binoculars that muddies small details. These coatings give you visibly sharper images and a more accurate color rendition. This is especially noticeable when viewing fine detail or when looking into the rising or setting sun at a silhouetted or backlit bird, where more sharply-defined color is visible in the shadowed areas of the bird.
  • 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, as well as your own back yard.
  • Armor. Black rubber armor absorbs noise and shock. Ribs on the sides of the body provide a solid hold when wet.
  • Twist-up eyecups. A mere eighth of a turn counterclockwise extends the eyecups for non-eyeglass use. A clockwise twist on the rubber-rimmed eyecups retracts them into the binocular body for eyeglass or sunglass use.
  • Good eye relief. The usable eye relief is a respectable 15mm. There may be some minor vignetting of the field for eyeglass wearers, but these binoculars are quite eyeglass-friendly.
  • Reasonable field. The field of view is a respectable 5.5° (288’ at 1000 yards).
  • Close focusing. The Conquest focuses down to a 9.8’, making it usable for close-in birding or backyard feeder watching, although its 5.5° field may limit its usefulness at very close distances.
  • Fast focusing. About one and a third turns of the comfortably-large ribbed focus knob moves smoothly from the under 10’ close focus out to the horizon and beyond.
  • Rotary diopter correction. A continuously-variable diopter knob at the front of the binocular hinge lets you match the binocular optics very precisely to your individual eyesight for the sharpest images. The location of the diopter correction knob assures that you won’t accidentally move it when adjusting the eyecup height, as you can with binoculars that have their diopter adjustment rings located at the base of the eyepieces.
  • Supplied accessories. The comfortably wide cloth-covered neoprene neck strap makes this lightweight binocular even easier to carry during all-day birding sessions. The supplied water-shedding Cordura-type cloth case has belt loop for no-hands/no shoulder strap carrying. An eyepiece rainguard completes the supplied accessories.
  • Lifetime warranty. This genuine Zeiss import qualifies for the unique Zeiss Lifetime Transferable Warranty available only to registered owners of Zeiss products that have been legally imported by Carl Zeiss USA. Click on the “Warranty Information” link to the left and then click on the “Zeiss” link in the warranty page that opens up for the full details of the Zeiss Lifetime Warranty.
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.
18 oz.
Limited Lifetime
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  • Wide comfort neckstrap
  • Eyepiece rainguard
  • Case
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Zeiss - 10X30mm T* Conquest

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Zeiss - 10X30mm T* Conquest
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Our Product #: Z1030C
Manufacturer Product #: 52 32 10
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The Zeiss 10 x 30mm Conquest puts legendary Zeiss optical quality into an easy to carry and handle mid-size/mid-price high power binocular . . .

. . . our 37th year