The numbers on binoculars, such as 10×50, refer to their magnification power and the diameter of the objective lens.
Magnification (10x): The first number (10) indicates the magnification level. In this case, it means that the binoculars can magnify the image ten times larger than what the naked eye would see. For example, if you are looking at an object that is 100 meters away, it will appear as if it is only 10 meters away through the binoculars.
Objective Lens Diameter (50): The second number (50) refers to the diameter of the objective lens (the lens furthest from your eye) in millimeters. A larger objective lens allows more light to enter the binoculars, which can improve image brightness and clarity, especially in low-light conditions, such as during dawn or dusk. In this case, the 50 mm diameter indicates a relatively large lens, which is beneficial for viewing in various lighting conditions.
In summary, binoculars labeled as 10×50 provide a magnification of 10 times and have a 50 mm objective lens diameter, making them suitable for activities like birdwatching, hunting, or stargazing, where both magnification and light-gathering ability are important.