A stereoscopic range finder is a device that helps determine the distance between an object and the viewer by using two different images and the principle of triangulation. However, there are several other names or synonyms for this device like binocular rangefinder, stereoscopic rangefinder, optical rangefinder, and triangulation rangefinder. They all serve the same purpose, but they differ in design, accuracy, and application. Some are handheld devices, used for hunting, golfing, or outdoor activities, while others are more complex, integrated into cameras, surveying equipment, or military weapons. Regardless of the name or type, a stereoscopic range finder is a useful device that can help measure distances accurately, especially where a direct measurement is impossible or dangerous.