Description:
The SKWoptics 10x42 ED Binocular smashes the scale of "must be high price" vs ED glass, delivering a compact & perfect optic that optically. HD Optical System - Optimized with select glass elements to deliver exceptional resolution, cut chromatic aberration and provide outstanding color fidelity, edge-to-edge sharpness and light transmission.Fully Multi-Coated - Increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces.Phase Coating - Phase prism coatings provide bright, clear, color-accurate images.Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt. This SKWoptics 10x42 ED binocular offers an ergonomic, with a large, ridged, central focusing knob for less weight and greater comfort. The fully multicoated ED glass lenses reduce color dispersion; provide high resolution image, increased light transmission, contrast and clarity.
What is ED lensThe differences between ED glass and an ordinary lens
Chromatic aberration is caused by a difference in light wavelength. The focal point or magnification of a lens varies according to the wavelength of each type of incident light.
Therefore, if you look at an image through a lens with chromatic aberration, color fringing may occur.
Because a single lens cannot compensate for chromatic aberration, two lenses of different optical characteristics are combined to correct this aberration. Nikon's original ED (Extra-low Dispersion) glass lenses effectively compensate for color fringing especially at high magnification.
When observing white subjects such as swans or white eagles with an ordinary lens, a chromatic aberration is prominent at the border of the background and white part of the bird.
When you use a Fieldscope for observation or digiscoping where you need natural color reproduction, a Fieldscope employing ED glass is recommended.
Visible light is composed of lights of various wavelengths. Gathering up all of these lights to a point is ideal for objective lenses.
With a single lens, because light is bent in the same way as with a prism, the focal lengths of lights with different wavelengths vary. As a result, not all light rays reach the same point, which causes chromatic aberration.
An achromatic lens made with conventional glass materials can match focal lengths of two different wavelengths. For red and blue colors, for example, that contain both ends of the wavelengths of visible light, chromatic aberration can be reduced to a certain extent by conforming their focal lengths. However, with more detailed examination, because light with other wavelengths such as green has different focal lengths, residual chromatic aberration results. This residual chromatic aberration is known as secondary spectrum.
Combinations of conventional glasses cannot solve this secondary spectrum problem, but particular optical materials which have a unique characteristic of dispersion are needed.
ED (Extra-low Dispersion) glass has this unique characteristic and when combined with other glasses minimizes the effects of the secondary spectrum. Comparing to achromatic lenses, ED glass reduces chromatic aberration to a remarkable degree.
Features:
Rubber Armor - Provides a secure, non-slip grip, and durable external protection.Waterproof - O-ring seals prevent moisture, dust and debris from penetrating the binocular for reliable performance in all environments.Shockproof - Rugged construction withstands recoil and impact.Fogproof - Argon gas purging prevents internal fogging over a wide range of Roof Prism - Valued for greater durability and a more compact size.Adjustable Eyecups - Twist up and down to precise, intermediate settings to maximize custom fit for comfortable viewing with or without eyeglasses.Center Focus Wheel - Adjusts the focus of both binocular barrels at the same time.Diopter - Adjusts for differences in a user's eyes. Located on right eyepiece.Tripod Adaptable - Compatible with a tripod adapter, allowing use on a tripod or car window mount.Specifications:Magnification: 10x Caliber(mm): 42 Prism System: Roof Prism Glass: BaK4 Focus System: Center Field Of View(ft/1000yds): 299 Close Focus Distance(m): 2 Exit Pupil(mm): 4.2 Eye Relief(mm): 14 Eyecup Type: Twist-up Resolution: ≤4.1'' Fog proof: Yes Water proof: 1.5m/3minsArgon Filled: Yes Phase coated: Yes ED Glass: Yes Coating: Full Multi-Coated Weight, g: 645L x W x H(mm) = 138 x 127 x 54Packaging details:
1 x SKWoptics 10x42 ED Binocular;
1 x soft carrying case,
1 x hard box
1 x cleaning cloth.
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About Us:
SKW Optical Technology (Shenzhen) Co., Ltd.is a manufacturer of high quality optical equipment for both military and civilian use. Our specialty lies in semi-high and high-end optical rifle scopes but we also produce spottingscopes, binoculars, firearm accessories (fully conform to the international law), battle fatigues, bullet-proof products and a wide range of outdoor accessories. Our factory which makes the optical scopes, located in Shenzhen, Guangdong, China.
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