Wiley X
Wiley X WX Vapor 2.5 Grey / Clear
Two lenses provided, covering day and night. This is the minimum useful configuration for field glasses, and it comes standard.
The two lenses
Smoked, VLT 15% - full daylight. A neutral grey that absorbs the spectrum uniformly: colors remain perceived at their true value and reflections are cancelled.
Clear - night, indoors, overcast. Protection without loss of light.
Between the two, coverage from dawn to dusk without carrying a second pair.
Military specification
The MIL-PRF-32432A tests a .15 caliber projectile launched at 702 to 724 km/h. This is the American ballistic requirement, of a completely different order than European impact grades.
The lens and its coating
Unbreakable, extruded, cut and then heat-formed Selenite polycarbonate. The hard coating resists scratches and fog.
The frame
Reinforced Triloid nylon, injection molded, anatomically shaped for prolonged wear. Lightweight and very durable.
Standards declared by the manufacturer
ANSI Z87.1+ and MIL-PRF-32432A. No European standards are mentioned on the datasheet for this reference.