Ningchongfine 10 * 25 HD Binoculars for Adults BAK4 Low Light Night Vision Binoculars (Raccoon Binoculars Black)

1、 The telescope lens adopts BAK4 prism, and the image is clear without dark edges. BAK4 is a material with a higher refractive index than BK7, which can effectively avoid vignetting, but the cost is relatively high, so it is used in telescopes.

2、 Product details:

1)、golden ratio: 10 times. 7-12 times is the golden magnification of the telescope, and military telescopes strictly follow this standard. Many 20 times, 30 times and the like in the market are false multiples, so you need to be cautious when buying

2)、All-round FMC multi-layer broadband green film, high light transmittance, effectively reduces the refractive index of light, and the image is clear and transparent

3)、fine workmanship, low polishing process, to ensure that the polished lens has higher precision and better optical effect

4)、life waterproof design, no fear of bad rain weather

5)、Lens material: BAK4

6)、diameter size: 25MM

7)、Eye pupil diameter: 2.2MM

8)、elephoto distance: 114M-1000M

9)、waterproof level: life waterproof