The celestron trailseeker 65 straight spotting scope has a rugged and durable rubber armored housing that is fully waterproof and nitrogen filled'. '.strtoupper('t')he optical system with proprietary xlt multi coatings renders high resolution images with outstanding contrast, while the dual focus mechanism allows you to find subjects in focus quickly and then fine tune the image'. '.strtoupper('i')t comes with many quality features, including a sliding sunshade, rotating tripod mount, and interchangeable eyepiece'. '.strtoupper('f')eatures celestron’s proprietary xlt fully multi coated optics increase light transmission through the optical path to deliver crisp, high contrast images'. '.strtoupper('f')ocus on a subject quickly, then fine tune the image using the dual focus mechanism with course and fine adjustments'. '.strtoupper('g')et close to the action with a zoom up to 48x magnification or see the widest field of view at 16x'. '.strtoupper('p')erfect for those who want performance in an easy to carry package, the 65mm objective design lets in plenty of light while keeping the overall size of the scope to a minimum.technical specificationsmagnification16 48xobjective lens diameter65mmlens coatingfully multi coated xlt coatingsangular field of view2.6° 1.3°linear field of view136 68ft 45 23m 1000yds mclose focus18ft 5.5meye relief18 15mmexit pupil4.0 1.3mmprismbak 4waterproof waterproof and fogproof – nitrogen filledrelative brightness16 1.69twilight factor 32.25 53.66weight ounces scope body 39.6, eyepiece 7.8, scope and eyepiece 47.4length inches scope body 12.5, eyepiece 3.9, scope and eyepiece 16.4width inches scope body 3.5, eyepiece 1.8, scope and eyepiece 3.5height inches scope body 4.8, eyepiece 1.8, scope and eyepiece 4.8warrantylimited lifetime