Compact and ergonomic design for comfortable handling. Rubber armouring protects against knocks. Robustness and low weight due to the glass fibre reinforced Polyamid housing. Sliding, lockable eyecups for use with or without eyeglasses. Diopter adjustment for individual setting between left and right eyes. Waterproof up to 400 mbar (4 m water depth). Nitrogen filled, no internal fogging. Temperature range - 20 degrees to +40 degrees C.