The optical tube is nitrogen filled and O-ring sealed to be waterproof and resistant to internal fogging when moving through extreme temperature changes or environmental conditions. To increase your mounting options, the TSN-553 comes outfitted with both a 1/4"-20 and 3/8"-16 tripod attachment-making it compatible with most photo, video, and field tripods on the market. Wide 15-45x fixed zoom eyepiece.
Ultra-low dispersion PROMINAR fluorite glass elements eliminate chromatic aberration, which causes halos, astigmatism, and fringing, for improved color rendition and contrast. Fully multi-coated optics maximize light transmission through the lens to improve image brightness, color rendition, and contrast. 132-69' field of view at 1000 yards. 45° angled eyepiece to place the user's head in a comfortable viewing position when sitting, standing, or lying prone. Smooth and precise fine and coarse two-speed focusing mechanism moves through the entire focus range in two turns.
Rubberized and textured zoom collar and focusing wheel. 58mm objective lens filter threads. Twist-up eyecup for comfortable use with or without eyewear. 3/8"-16 and 1/4"-20 mount to accommodate most photo, video, and field tripods. Long 16.5-16mm eye relief.
3.7-1.2mm exit pupil. Lightweight and impact-resistant polycarbonate chassis.Nitrogen filled, IPX7-rated to be waterproof and resistant to internal fogging when moving through extreme temperature changes and conditions. Oil-resistant KR exterior lens coatings makes it easy for dirt, sap, and oil to be cleaned off without smudges or residue. Retractable sunshade reduces glare and lens flare and keeps snow and rain off the objective for clearer viewing.