English
Detailed Synonyms for focal ratio in English
focal ratio:
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the focal ratio
– the ratio of the focal length to the diameter of a (camera) lens system 1the speed; the focal ratio; the stop number; the f number– the ratio of the focal length to the diameter of a (camera) lens system 1 -
the focal ratio
– In photography, the diameter of the aperture expressed in terms of the focal length of the camera lens. The greater the f-number, the less light reaches the film and the more in focus the objects in the foreground and the background will be. For example, with an f-number = 16 the objects in the far background will be in focus. Whereas, with an f-number = 2 the background will be blurry (while foreground objects are in focus). 2the aperture; the f-number; the aperture value; the focal ratio– In photography, the diameter of the aperture expressed in terms of the focal length of the camera lens. The greater the f-number, the less light reaches the film and the more in focus the objects in the foreground and the background will be. For example, with an f-number = 16 the objects in the far background will be in focus. Whereas, with an f-number = 2 the background will be blurry (while foreground objects are in focus). 2