The Leica Ultravid HD 12x50 binoculars offer impressive high performance in poor lighting conditions. Detailed viewing is possible even into darkness. The new HD optics ensures that little bit extra in terms of light yield. Even extreme cold cannot keep the robust Ultravids from delivering the ultimate viewing experience: the new focusing mechanism on the Leica Ultravid HD models works with high-performance Teflon disks and almost no lubrication. This ensures constant smooth focusing - even at temperatures as low as -25 degrees, where other binoculars would surely fail.