10x50 12x50 Large Eyepiece Waterproof HD Binoculars Telescope With Bak4 Prism

※ Large eyepiece Wide field of view
Visual viewing comfort, effectively avoid dark Angle, wide field of vision, smaller color difference, stronger effect.

※ Multilayer wideband HD coating
Special high transmittance FMC multilayer coating, high transmittance of 99% color clear and sharp.

※ Center focus hand
Wheel environmental rubber material, feel comfortable, left and right adjustment accurate and fast focus.

※ Paul type nitrogen-filled waterproof
On the market, the rare Paul type nitrogen-filled waterproof nitrogen-filled anti-fogging IPX7 nitrogen-filled waterproof.

※ BAK4- Prism Prism

The imaging reduces the reflection, the imaging is bright and sharp, and the true restoration degree is high.

Product specification

MODELS	8x42	10x42	10x50	12x50
Magnification	8x	10x	10x	12x
Objective lens diameter (mm)	42	42	50	50
Exit pupil diameter (mm)	5.3	7.1	5	4.2
Relative brightness	28	24	25	18
Twilight factor	18.3	18.7	22.4	24.5
Eye relief (mm)	21	24	19	14
Field of view,real (degree)	8.1°	7°	6.5°	5.6°
Field of view,apparent (degree)	65°	49°	65°	67°
Field of view,real (m / 1000 M )	142M	122M	114M	98M
Field of view,real ( ft / 1000 yds)	425FT	367FT	342FT	294FT
Close focusing distance (m)	3	5	5	6
Diopter compensation (dpt)	±4	±3	±4	±6
weight	980g	980g	960ɡ	960ɡ
size	220X200X80MM
Interpupillary distance (mm)	53 ～74
Focus system	Center
Prism system	Porro
Prism glass	BAK4
Objective lens structure	2 elements/ 1 groups
Eyepiece lens structure	4 elements/ 3 groups	3 elements/ 2 groups	4 elements/ 3 groups
Lens and prism coating	Fully multi-coated on all air exposed lenses
Eyecups style	Twist up with 3 click stops
Waterproof	Yes
Adapt to tripod	Yes

Established in 2011, Xiangyang Youbo Photoelectric Co., Ltd. was born for Armory factory served for Military Purpose.

The 2 main Manufacturing Facilities are located in Deyang and Xiangyang, both of which have passed I S O 9 0 0 1 certification. We have been engaged in O E M, O D M, Customization service for companies all over the world, big medium and small, in North America, Europe etc. ,

Quality is our culture - Through the efforts of our efficient Q C team, defective rate is maintained below the lowest level in the industry.
Continuous Technology Innovation and New Products R and D are our concepts - We have our own R and D center to provide ultimate multi-purpose solutions and develop new innovative products.

We Pride ourselves as the leading One Stop Solution Verified Provider for designing, researching, developing, producing, marketing and shipping a great variety binoculars, monocular, spotting scopes, rangefinders, night vision devices, riflescopes, astronomical telescope, and other optics accessories. By vertical integrating production with scale and product diversification, Youbo Optical provides highly valued products at a lower cost.

At present, our business partners located throughout every continent, developing around 70 brands, include 30 famous brands. Youbo Optical have an annual output value over US$10million with annual production capacity of 2,000,000 units optics

Xiangyang Youbo Photoelectric Co., Ltd welcome customers from all over the world. We are sincerely dedicated to partnering with you to get win-win cooperation.