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What is light transmission in a monocular or binocular and how is it measured?
The light transmission in a monocular or binocular refers to the amount of light that passes through the device and reaches the viewer's eye. The higher the light transmission, the brighter and clearer the image will appear.
What do these numbers mean in the description of a monocular 8x25 or a binocular 10x42?
In the description of a monocular or binocular, such as 8x25 or 10x42, the numbers refer to the magnification power and objective lens diameter, respectively.