10×50

10×50 is a notation used in several fields to indicate either a mathematical product or a specification in optics and measurements. The expression is read “ten by fifty” and its meaning depends on context, ranging from arithmetic results to equipment characteristics.

In mathematics, 10×50 equals 500. It may appear in problems, price calculations, or any situation requiring the product of two factors. As a unitless expression, it simply represents multiplication of ten and fifty.

In optics, 10×50 commonly appears as a binocular specification. It denotes a device with 10 times magnification and a 50 millimeter objective lens diameter. The larger the objective lens, the more light can reach the eye, improving brightness in dim conditions. For a 10×50 binocular, the approximate exit pupil is 50 divided by 10, or 5 millimeters, which is suitable for many adults in typical lighting. Higher magnification provides a closer view but can reduce the field of view and require steadier handling. Such binoculars are often chosen for general outdoor use, land surveying, wildlife observation, or travel.

Other usages include dimensional or model-related descriptions in manufacturing, packaging, or labeling, where 10×50 may indicate length by width, height by width, or other paired measurements. Without explicit units or context, the meaning remains ambiguous and should be clarified with accompanying specifications.