Konuspot 100 Angled-viewing 100mm

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This very economical Konuspot 100mm angled viewing spotting scope makes a very big aperture spotting scope affordable for just about everyone. For little more than the cost of a good quality conventional 60mm scope, the Konuspot 100’s large 100mm objective lens gives you over two and three-quarter times more light grasp than a 60mm scope. This extra light grasp can help you make positive species identifications in poor lighting conditions, such as in twilight or under heavily overcast skies. In all lighting conditions, its 100mm aperture provides 66% higher resolution than a conventional 60mm spotting scope for making identifications at long distances, but with little penalty in size or weight.

For the birder on a budget, the 100mm angled viewing Konuspot 100 gives you more optical performance than you ever thought your budget would be able to afford. Compared to other 100mm spotting scopes, it is an exceptional bargain at its very low price.

Optical features of this scope . . .

  • 100mm objective lens gathers over 278% more light than a 60mm scope for superior low light performance. The crown and flint glass optics are multicoated for good light transmission. The optics are quite nice for such an economically-priced spotting scope – bright, contrasty, and sharp – with only minor distortion, chromatic aberration, and astigmatism. These Konus optics are not in the class of a Leica or Zeiss spotting scope, but they come surprisingly close for only a tiny fraction the price of those top-of-the-line models. It often comes as somewhat of a shock to discover just how good economy-priced optics have become recently, thanks to state-of-the-art computer-aided design and computer-controlled lens grinding and polishing. This scope is a good example of what modern optical designers can do for very little money.

  • The eye relief of the standard equipment 20-60x multicoated zoom eyepiece is not specified, but we typically measure it at about 18mm eye relief at 20x, and about 12mm at 60x. There will be some minor vignetting of the field for eyeglass wearers at 60x, but very little at 20x. A shallow rubber eyecup helps shield the eye from ambient light for better contrast. It rolls down for eyeglass use.

  • The scope close focuses to under 30’. Through the scope, looking at a bird at this distance at 20x would effectively be the same as looking with your unaided eye from only 1’ 6” away.
Mechanical features of this scope . . .
  • The scope is O-ring sealed and nitrogen purged to be waterproof in wet weather. The nitrogen purging keeps the scope internally fogproof in cold weather or rain forest-type humidity.

  • Its retractable lens shade serves the dual purpose of improving the visual and photographic contrast as well as keeping raindrops off the objective lens during inclement weather. A slip-on plastic lens cover protects the objective lens when the scope is transported or stored. A plastic cap keeps the zoom eyepiece dust-free when the scope is not in use. The lens shade is lightly rubber armored for shock protection, as is the prism housing.

  • A sighting tube built into the left side of the body allows fast centering of the scope on distant birds.

  • The scope’s focusing knob is located at the top right front of the prism housing to allow precise focusing with either hand, even while wearing gloves or mittens. It is semi-recessed to resist snagging on clothing or carrying case and is grooved for a sure grip. Focusing speed is average compared to most scopes, with twelve turns of the focus knob needed to move from a precise focus at one end of the focus range to the other.

  • Its lightweight body is made of rugged injection-molded polycarbonate to keep the weight reasonable for such a large aperture scope. The body is finished in a rubberized green paint to provide a good grip in wet weather.

  • The Konuspot 100’s 45° viewing angle is generally more comfortable than straight-through viewing for watching treetop activity or for extended observing from a blind or back porch. It is also more convenient for observing couples of varying heights who must share a single scope, as there is little need to constantly raise and lower the tripod to a comfortable observing height for each observer. If you are tall, you will not have to crouch over to see through the Konuspot 100, as you would a straight-through scope, saving you from a possible literal pain in the neck.

  • The scope mounts on any photo tripod having a standard 1/4”-20 thread mounting bolt. Loosen a knob on the left side of the scope and you can rotate the scope from side to side to put the eyepiece at the most comfortable viewing angle.

  • A water-shedding soft carrying case is standard equipment. The case has an adjustable length shoulder strap for carrying.

  • For photography, a camera adapter is supplied. It needs only an inexpensive optional T-ring to connect to your 35mm camera body to turn the scope into a high power telephoto lens. The camera adapter threads onto the scope over the zoom eyepiece. There are cutouts in the camera adapter that allow you to change the magnification of the zoom eyepiece (and consequently the photographic magnification) without having to remove the camera adapter from the scope. The exact photographic magnification and focal ratio of the scope will depend on the magnification setting of the zoom eyepiece. A clever spring-loaded baffle in the adapter presses up against the rubber eyeguard of the zoom eyepiece during photography to keep ambient light from getting into the adapter through the eyepiece-adjusting cutouts. This improves the photographic contrast.

All in all, a very modestly-priced big-aperture spotting scope that performs much more expensively than it costs.

Magnification:
Magnification is the ability of a telescope to make a small, distant object large enough to examine in detail. If you look at the Moon (250,000 miles away) with a 125 power (125x) telescope, it's essentially the same as looking at it with your bare eyes from 2000 miles away (250,000 ÷ 125 = 2000). The same telescope used terrestrially will make an object one mile away appear to be only 42 feet away (5280 feet ÷ 125 = 42).
The magnification of a telescope is determined by dividing the focal length of the telescope (usually in millimeters) by the focal length of the eyepiece used (again, usually in millimeters; but in all cases by the same unit of measurement used for the telescope focal length). For example, a 2000mm focal length telescope and a 10mm focal length eyepiece will give you a magnification of 200 power (2000 ÷ 10 = 200). The same 2000mm telescope with a 20mm eyepiece will give you 100x (2000 ÷ 20 = 100).
20-60x
Field of view 1000 yards:
100' @ 20x; 51' @ 60x
Near Focus:
>30'
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 @ 20x; 12mm @ 60x
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.
5mm @ 20x
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.
44.72 @ 20x
Aperture:
This is the diameter of the light-gathering main mirror or objective lens of a telescope. In general, the larger the aperture, the better the resolution and the fainter the objects you can see.
3.9"
Length:
19.2"
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.
Partial
Waterproof:
Yes
Weight:
The weight of this product.
5 lbs. 6 oz.
Warranty:
1 year
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  • Carry case
  • 20-60x zoom eyepiece
  • Sliding lens shade
  • Lens and eyepiece caps
  • Camera adapter
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Konuspot 100 Angled-viewing 100mm

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Konuspot 100 Angled-viewing 100mm
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Our Product #: K100SS
Manufacturer Product #: 7122
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This very big aperture Konus spotting scope has a small aperture scope price . . .





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