Kowa BDXD 12x56 binoculars feature XD extra-low dispersion glass lenses to practically eliminate chromatic aberration, Schmidt-Pechan roof prism lens and C 3⊂ coating fore 99% reflectivity, thixomolded magnesium alloy body, KR coating, all-surface multi-coating, waterproof/fogproof construction, and twist-up eyecups.