f-number
柯林斯词典
1. N the numerical value of the relative aperture. If the relative aperture is f8, 8 is the f-number and indicates that the focal length of the lens is 8 times the size of the lens aperture 焦距比数[photog] →see alsoT-number
返回 f-number
1. N the numerical value of the relative aperture. If the relative aperture is f8, 8 is the f-number and indicates that the focal length of the lens is 8 times the size of the lens aperture 焦距比数[photog] →see alsoT-number