Example image of eyePlorer eyePlorer map for 'Telescopic sight': Air gun Crossbow Firearm Iron sight Reflex sight Refracting telescope Stronsdorf Diameter Magnification Objective (optics) Optics Exit pupil Eyepiece Prime lens Zoom lens Field of view Angle Linear Iris (anatomy) Vignetting Eye relief Handgun Scout rifle Recoil Reticle Windage Leupold & Stevens Stadiametric rangefinding Angular mil Minute of arc Metric system Systems of measurement Royal Netherlands Army Schmidt & Bender Sniper Carl Zeiss AG Battery (electricity) Light-emitting diode Night vision Radionuclide C79 optical sight ELCAN Optical Technologies SUSAT Tritium Advanced Combat Optical Gunsight Trijicon Radioactive decay Optical fiber Parallax Muzzleloader