Outfitted with superior High Density and Extra-Low dispersion optics, the Vortex's 3-15x42 Razor HD LH Riflescope does not compromise on ruggedness or precision opto-mechanics. To offer exceptional image quality and transmission of balanced color spectrum, low dispersion of passing light, and to deliver high definition true-color images, the lenses are crafted from high definition High Density (HD) Extra-L ow dispersion optical glass and a 42mm objective aperture that gathers enough light to provide bright images in most lighting conditions. The lenses are fully multi-coated with proprietary XRPlus anti-reflection coatings for maximum transmission and minimum glare. With the additional ArmorTek scratch-resistant coating, the objective lens is protected from scratches, debris, dirt, oil, and fingerprint stains. Magnification 3-15x Objective Lens Diameter 42mm Maintube Diameter 1" Field of View 35.8-7.1' @ 100 yd (11.3-2.4 m @ 100 m) Parallax Correction 20 yd (18.3 m) Eye Relief 3.8" (96.5 mm) Exit Pupil 14-2.8 mm Reticle G4 BDC Reticle 2nd focal plane Impact Point Correction 1/4 MOA Maximum Windage/Elevation Adjustment 55 MOA Impact Resistance Yes Waterproofing Waterproof and fogproof, argon-filled Length 13.5" (343 mm) Weight 16.5 oz (467.8 g)