Low dispersion (ED) glass lens, to achieve color-variation compensation, and make observation more clear
SMC (multilayer film coating) can decrease the Visible/Near Infrared (VIS/NIR) Spectral Reflectance. Make images more sharp, clear and bright
BAK4 prism + Highly reflective dielectric film + phase film
Nitrogen filled waterproof (water depth 1m, available to soak 30 minutes) antifogging
Magnesium aluminum alloy body, antioxidant, fall resistance , strong , high and low temperature resistance, make time expend
Anti-slip body