65mm objective lens Porro prism optical path 460mm focal length Fluoride glass lenses The low refractive index makes them naturally anti-reflective Produce bright and clear images with true color rendition and high contrast Greatly improves viewing when used with SWAROTOP lens coatings SWAROTOP: Anti-reflective multi-coating enhances light transmission SWAROCLEAN: Non-stick proprietary external coating makes cleaning/removing dried-on mineral residue, insect repellent, and tree resin easier Reticle Placed on First Focal Plane Ranging duplex-style with 1/4 MOA increments on all axes Ranging stadia on lower left and right quadrants Illuminated reticle runs for 1300 hours on a single CR123 battery Fifteen brightness levels: 10 for daylight, 5 for night Can be complete disabled for clear, unobstructed viewing Use and Handling Straight viewing enables fast subject acquisition and tracking Wide ribbed fast-focus collar Reticle can be completely removed from sight for use as a regular spotter 1/4"-20 and 3/8"-16 tripod mounting Rotating tripod collar Tethered flip-down objective lens cap Construction Details Lightweight and durable magnesium housing Nitrogen-filled to be fogproof and submersible to 13' SWARODUR exterior lens coating beads oils and water, and protects from scratches and abrasions Broad operating temperature of -40 to 158degF DEMO products may or may not include accessories.