This new Leica uses specially formulated SCHOTT HT glass, which increases light transmission especially in the blue-violet light band, improves colour fidelity, and enhances low-light performance. Scratch- and abrasion-resistant High Durable Coating (HDC) and hydrophobic AquaDura coating on the outer lenses protect surfaces and cause water and oil to bead off for easier cleaning and clearer vision. The roof prisms feature P40 phase correction and proprietary High Lux System (HLS) coatings. These coatings virtually eliminate chromatic aberration for enhanced colour rendition and increased contrast.
Complementing the optical performance are uncompromising construction details. To reduce user fatigue during long birding sessions, the chassis is made of a lightweight yet durable magnesium alloy, with a high-tensile titanium centre hinge axle. The optical tubes are nitrogen filled for fogproof performance and sealed to make the binocular submersible to 5 metres Ergonomic thumb indents on the bottom of the binocular coupled with protective rubber armouring provide a comfortable slip-resistant grip. A lubrication-free focus system provides fast and precise focusing, with PETP-Discs to provide smooth movement throughout the broad operating temperature range.