200mm

200 millimeters (mm) is a unit of length in the metric system equal to 0.2 meters. It is commonly used to express dimensions of objects, components, and distances in science, engineering, construction, and everyday life. In decimal form, 200 mm equals 20 centimeters or 0.2 meters, and it is approximately 7.87 inches or 0.656 feet.

Applications and context: In photography and optics, a 200 mm focal length denotes a telephoto lens that magnifies distant subjects and provides a narrow field of view. Such lenses are favored for wildlife, sports, and other remote subjects, and their apparent field of view can change with sensor size due to crop factors. In manufacturing and engineering, 200 mm is a common dimensional reference for parts, plates, or tool shanks and can appear in drawings, machining tolerances, and product specifications. In everyday products, measurements around 200 mm are common for items such as rulers, kitchenware, and compact devices.

Contextual notes: The millimeter is a subdivision of the meter, with 1000 millimeters making up one meter. The use of metric measurements like 200 mm is standard in many regions for technical drawings, construction plans, and consumer product design, facilitating precise specification and interoperability across industries.