Item: 10-40x56 Magnification: 10x-40x Objective Lens Diameter ( mm) : 56 Ocular Lens Diameter ( mm) : 37 Field of View ( ft/ 100yads) : 10-2.5 Field of View ( m/ 100m) : 3.4-0.9 Exit Pupil ( mm) : 5.6-1.4 Eye Relief ( inch) : 4.1-3.3 Reticle: Glass-etched Illuminated Parallax: 0.125 Diopter Regulation ( degree) : c3-b2 Click Value ( inch) : 0.125 Tube Diameter ( inch) : 1.378 Water Resistance: Yes Fog Resistance: yes Shock Resistance: 3000G Weight ( g) : 1060 Length ( mm) : 470 Coated FMC green