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5.5mm lens - Manufacturers, Suppliers, Factory from China

The focal length of a lens is one of the key factors that determine the field of view of the lens. The field of view is the extent of the observable scene that can be captured by the lens, and is usually measured in degrees or millimeters. In general, a shorter focal length will result in a wider field of view, while a longer focal length will result in a narrower field of view. This relationship is often described using the angle of view, which is the angle formed by the two lines drawn from the lens to the edges of the image sensor or film plane. For example, a M12 Mount wide-angle lens with a focal length of 1.5mm might have an angle of view of 140 degrees, while a M12 Mount l6mm lens might have a far narrower angle of view . The actual angle of view will also depend on the size of the sensor or film plane and other factors, but the general relationship between focal length and field of view remains the same.

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