COFRA GUNNER GREY GLASSES
LENS:
MATERIAL: polycarbonate
COLOUR: grey
CURVATURE:
2-5 business days
up to 14 calendar days
STANDARDS:
EN 166 - General standard,
EN 172 - Solar protection filters for industrial use,
STANAG 4296 - Eye Protection For The Individual Soldier/Ballistic Protection
MARKING:
LENSES TREATMENTS:
FRAME:
FRONT MATERIAL: polycarbonate
MATERIAL OF TEMPLES: polycarbonate
MARKING:
FRAME FEATURES:
FURTHER TECHNICAL FEATURES:
WEIGHT: 33 g
AREA OF USE: mechanical indoor work with good visibility conditions.
PLUS: BALLISTIC RESISTANCE, STANAG 2920 - STANAG 4296
BALLISTIC RESISTANCE
STANAG 2920 and STANAG 4296 are standards for the evaluation of ballistic resistance in all member countries of NATO. Unlike the compliance with the European Norm EN 166 which determines the impact resistance of a steel ball with a diameter of 6 mm and a mass of 0,86 g hitting the eyepieces at a speed of 45 m/s, the compliance with STANAG 4296 standard guarantees the ballistic resistance defined by STANAG 2920 standard, determining the ballistic resistance against 0,22” bullets that can reach a speed up to 275 m/s (990 km/h). STANAG 2920 does not define a minimum protection threshold in the same way as EN 166, but it allows to specify a speed V50 that represents the speed at which a bullet could perforate the eyepiece with a 50% probability. In addition, glasses complying with STANAG 4296 standard must also meet a number of requirements, such as:
• impact resistance according to the conditions defined by STANAG 2920 standard;
• criteria about their use: the glasses must be as light and comfortable as possible, have a maximum fogging reduction (through ventilation and/or an appropriate coating) and have a good resistance to scratches in case of prolonged use;
• optical quality: glasses must provide a visual field of at least 160° and must not distort vision;
• additional features: the glasses must have a gloss level as low as possible and must be compatible with the use of other protective elements.