Vortex Razor HD GEN III 1-10X24MM EBR-9 BDC MRAD I, Argon filled housing for fogproof performance XR anti-reflective fully multi-coated lenses Brass alloy erector tube system with tumble-polished chromium vanadium erector spring ArmorTek scratch-resistant lens coating 11 brightness levels with off setting in between EBR-9 BDC MRAD Illum Reticle Specifications: Magnification: 1 to 10x Objective Lens Diameter: 24 mm Field of View: 1x(38.5 m @ 100 m) 10x(3.9 m @ 100 m) Exit Pupil Diameter: 1x(24 mm) 10x(2.4 mm) Eye Relief: 83.8 mm Reticle Type: EBR-9 BDC MRAD Reticle (First Focal Plane) Illumination: Illuminated Illuminated ColorRed Brightness SettingsAdjustable Brightness (11 Levels) Impact Point Correction: 1/10 MRAD per Click Windage Adjustment: 30 MRAD Elevation Adjustment: 30 MRAD Parallax Correction: Yes, 91.4 m to Infinity Water Resistance: Waterproof, IPX7 Fogproof: Yes, Argon Filled Maintube Diameter: 34 mm Battery: 1 x CR2032 Dimensions: 260 mm Weight: 609 g