Zeiss Carl Optical Inc Monocular (10x25 T Monocular) Carl Zeiss monoculars provide remarkably crisp, bright image quality and large fields of view, encased in sleek, elegant profile 10x25 model is miniature unit with powerful 10X magnification Patented T* anti-reflective multi-coating and non-slip housing; comes with leather pouch and carrying strap 25-millimeter objective diameter, 2.5-millimeter exit pupil, 15-millimeter eye relief; weather-proof housing sealed against water spray; 4.3 inches long; 3.1-ounce weight Carl Zeiss products include warranties of lifetime on optical components; five years on electronic components; two years on camera components; and one year on carrying straps, lens caps, and similar accessories