M12 40 Degree Lens - Manufacturers, Suppliers, Factory from China

The field of view of a lens refers to the extent of the scene that can be captured by the lens at a specific distance and focal length. It is often measured in degrees, indicating the angle between the two furthest points of the captured scene. A 30 degree lens with a narrower field of view will capture a smaller portion of the scene, while a lens with a wider field of view will capture a larger portion of the scene. The field of view is influenced by several factors, including the focal length of the lens, the size of the sensor or film being used, and the distance between the lens and the subject. For example, a wide-angle lens will have a larger field of view than a telephoto lens at the same distance and focal length. In general, a wider field of view allows for more of the scene to be captured, while a narrower field of view is useful for isolating a specific subject or detail in the scene.

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