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|Product:||10X25 Roof Prism Binoculars||Color:||Yellow Or Black|
|Coating:||Fully Multi Coated||Body Material:||Aluminum|
|Prism Material:||Bak4||Near Focus:||5m|
bird watching binoculars,
compact waterproof binoculars
10X25 Waterproof Roof Prism Binoculars BAK4 For Hiking Sighting Aluminum Body
The body of Binocular can be folded to provide a adapted field to view
2.FMC BAK4 Prism
Fully-multi coated optics and ultra-wide band coating help deliver best in class brightness and clarity.
Waterproof: IPX7 level waterproof standard stay in 1.5m deep water for 30 min.
Fogproof: vacuum and lifetime pressurising with a mixture of nitrogen and rare earth gases to prevent fogging or hazing from -51F to +212F,Vaporless, fogless, mirageless from well below sea level to 8km altitude.
|Objective Lens Dia. :||25mm|
|Exit Pupil Dia. :||
|Eye Relief :||12mm|
|Field of view :||142m/426ft|
|Field angle :||8.1 degree|
|Prism material :||BAK4|
|Focus system :||center focus|
|Lens coating :||fully multi coated|
|Near Focus :||6m|
|Water/Fog Proof :||Yes|
|Folded Size :||7.5x11x5.5cm|
1. Appearance Options
2. Optical System Options
3. Design your own model with our R&D support
4. Color Box Options
5. Neutral / OEM Packing
1. Standard factory test before delivery
2. Defective Rate 5‰
3. 2 Year limited warranty
1. Are your company a manufacturer or trading company?
We are well-experienced manufacturer specialized in producing binoculars,rifle scopes, monocular, spotting scope, astronomical telescopes, optics accessories etc., for more than 15 years.
2. Does your product have any warranty?
Yes,we offer 5 years limited warranty for rifle scopes vs 2 years limited warranty for other optical instruments such as binoculars, monocular, spotting scope, astronomical telescopes, etc.,
Damage due to misuse, ill treatment and unauthorized modifications and repairs are not covered by our warranty.
3. What's your payment method?
We usually accept the payment methods include T/T (Bank Transfer), Western Union, paypal and MoneyGram. Payment methods can be adaptable to your specific requirements.
For different countries, the payment methods we accept varies from each other.
50% deposit in advance and 50% balance before shipping. Payment terms can be negotiated.
4. What's your shipping method?
We provide comprehensive shipping methods.
For small quantity orders we ship by DHL,FEDEX, EMS/TNT Express service which is the fastest. Postal ways are also acceptable for small orders.
For large quantity orders we ship by Air or by sea, we can also ship order to buyer’s cargo agent in China.
We provide DDP service to both express way and air and sea shipping!
5. Does your company provide customization, private label service?
YES. OEM/ODM/Customization/Making your own logo/ brand are warmly welcome!
We can make adjustment or change to our products to meet your demands.
We can design, innovate, develop and produce new item molds according to your specific requirements.
Packaging can be made as per your artwork and we also provide professional designer to make design for you free of charge if you like
What to look for when buying binoculars
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.
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