Payment & Shipping Terms:
|Item:||10x42 ED Binocular||Body Material:||Titanium Paint & Rubber|
|OEM/ODM:||Accepted||Feature:||Waterproof / Fogproof|
ed glass binoculars,
long distance telescope
Green ED Binocular Waterproof Telescope 10x42mm Center Focus
Extra-low dispersion lens applied reduces chromatic and spherical aberrations for increased contrast, improved color rendition, and sharpness without distortion across the entire field of view
42mm objective lenses improve light-gathering ability without adding excessive bulk or weight
10x power magnifies objects without sacrificing field of view or exit pupil
2.58-73mm interpupillary distance range allows easy use by a wide variety of people
3.Long 15mm eye relief helps to reduce eyestrain and improves viewing comfort
4.8x power magnifies objects without sacrificing field of view or exit pupil
5.42mm objective lenses improve light-gathering ability without adding excessive bulk or weight
|Field of view Angle||6.5°|
|Field of View||114m/342ft|
|Lens coating||Fully coated blue|
|Adjustable eye pupil||58-73mm|
|Focus system||Center Focus|
|Surface materials||Titanium Paint & Rubber|
|Functional temperature||-13°F to +131°F (-25°C/+55°C)|
OEM/ODM/Private Label is welcome!
1. Packaging can be customized as you required.
2. Imprint your logo/brand to the product.
3. Lens coating can be FMC multi-coated green, Fully- Coated Green, Single Green Coat, Single Blue Coat as you required.
Established in 2011, Sichuan Tongdudayi Technology Co.,LTD, is dedicated and specialized in R&D, Manufacturing and Marketing Riflescopes and Optics Instruments including binoculars, telescopes, range finders, monocular, optics accessories, etc.,
Located in Shifang city where is very close to Chengdu - the "Land of Abundance", Sichuan Tongdudayi Technology Co.,LTD has over 300 employees including more than 30 research engineers and over 40 QC assistants.
We have an annual output value over US$20million with annual production capacity of 300,000 units, and the GMP certified manufactory area covers around 3,000 square meters.
"Quality is our culture" - We have been engaged in OEM and ODM service for companies all over the world, big medium and small. At present, our business partners located throughout every continent, developing around 100 brands, include 30 famous brands - Discovery, Vector, Marcool, Visionking, Nikula, Bresser, etc.,
"Continuous Technology Innovation & New Products R&D is our concepts" - Just as nature never comes to a standstill and constantly changes, our company is always striving with a tireless curiosity and relentless passion to set new standards with technical innovations, increase product range and insisting on developing new products each month.
"With us your money is safe" - Full refund in case of bad quality.
"Time is Gold is our Value" - Time is valuable for you and us! We cherish every moment and minute to provide the best service for you and we do our utmost to finish production for you ahead of time.
Through 7 years' constant efforts, we have gained great popularity in the world market and shall continue to the endeavoring for many years ahead! We cordially hope to establish permanent, steady and cooperative partnership with you!
What to look for when buying binoculars
Magnification and objective lens diameter
When browsing binoculars, you’ll notice they come with a set of numbers, such as 12x60 or 10x25.
The first number refers to the magnification, and the second number refers to the diameter of the objective lens.
Objective lens diameter
The second number is the diameter of each objective lens in millimeters. The larger the objective lens, the more light is let into the binoculars and the brighter and sharper the image will be.
The tradeoff: Bigger objective lenses equal binoculars that are heavier, bulkier, and more difficult to keep stable without a monopod or tripod.
A pair of binoculars’ magnification is the amount of times closer the scene you’re viewing appears compared to observing with the naked eye. Binoculars with a magnification of 12x make objects appear 12 times closer than they would if you were looking at them without binoculars.
The right level of magnification depends on what you’ll be using your binoculars for. For instance, you need 3x to 5x for the theater, 7x for sporting events, 8x to 10x for birdwatching, and 10x to 30x for stargazing.
The exit pupil is the amount of light that reaches the eye from the objective lens up to the eyepiece. The diameter of the exit pupil should ideally be larger than the size of your pupil, otherwise you’ll end up with a reduced field of view.
When thinking about the exit pupil, bear in mind the diameter of your pupil can range from roughly 1.5mm in very bright light to about 8mm in pitch-dark conditions. To calculate the exit pupil of a pair of binoculars, divide the objective lens diameter by the magnification.
The purpose of a lens coating is four-fold: to reduce glare and reflections, to make colors appear more vivid, to increase light transmission, and to improve contrast.
Lenses may be uncoated, coated (meaning they have one layer of coating), multi-coated (they have several layers of coating), or fully multi-coated (all lens surfaces inside and out have multiple layers of coating).
You’ll find one of three types of prisms in most binoculars: BaK-4, SK-15, or BK-7. The properties to look for in a good prism are a high refractive index and a low critical angle — this means a prism can transmit with less light lost as a result of internal reflection.
BaK-4 prisms are considered the highest quality, followed by SK-15 and BK-7 prisms. That said, all are made from special optical glass, so even binoculars with BK-7 prisms provide a decent image quality.
Angle of view and field of view
Both the angle of view and the field of view express how much scenery you can see when looking through your binoculars. Some manufacturers list both of these specs, whereas others list just one.
Angle of view is measured in degrees; field of view is measured in feet. So, for most people, the field of view is more meaningful than the angle of view.
Contact Person: Jane Tian