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    相机镜头的种类和特点
    2015/6/19 10:51:59
    相机镜头的种类繁多,根据它的视角和焦距的变化可以分为标准镜头、广角镜头、长焦镜头和特殊用途镜头,根据焦距能否调节可以分为定焦镜头和变焦镜头。山东艺考摄影培训www.dysypx.com
    There are many different types of the camera lens. According to the changes of the angle and focal length can be divided into standard lens, a wide-angle lens, telephoto lens and special purpose lens according to the focal length whether regulation can be divided into fixed focus lens and zoom lens.
    1、标准镜头
    1, standard lens
    标准镜头其焦距接近相机画幅对角线的长度,其视角范围大约在40°~60°。之间,我们人眼的视角大约在46度左右,标准镜头的视角与人眼的视角相近,其所拍摄画面中景物之间的透视关系,与人眼视角所感受到的景象非常相似,没有透视变形, 符合我们人眼的视觉习惯,给人以真实平和的视觉感受,因而在摄影中得到广泛应用。
    The standard length of the lens and the focal length of the diagonal frame close to the camera, the angle range of about 40 DEG ~60 deg. Between our human perspective about 46 degrees, similar standard lens angle of view and the human perspective, the shot picture in between scenes of perspective, and perspective of the human eye feel the scene is very similar, there is no perspective distortion, in line with the our human visual habits, gives a true peace and visual experience, so it is widely used in photography.
    2、广角镜头
    2, wide-angle lens
    广角镜头又称短焦距镜头,它的焦距小于相机画幅对角线的长度,其焦距短于标准镜头,视角范围大于标准镜头。广角镜头分成普通广角镜头和超广角镜头两种。在135相机的系列镜头中,焦距范围在24mm--35mm之间的称为普通广角镜头,视角在120°左右。
    Wide angle lens, also known as short focal length lens and its focal length is less than the length of the camera frame diagonal and its focal length is shorter than the standard lens, angle range is larger than the standard lens. Wide angle lens is divided into two kinds of ordinary wide-angle lens and ultra wide angle lens. In a series of 135 cameras, the focal length range of 24mm--35mm is between, which is a common wide-angle lens.
    3、长焦镜头
    3, telephoto lens
    长焦镜头又称远摄镜头或望远镜头,它的焦距长度大于相机画幅的对角线,视角比标准镜头小,焦距比标准镜头长。长焦镜头的特点与广角镜头的恰好相反,视角小,能远距离摄取景傲的较大影像且不易干扰被摄对象,这一点非常适合远距离拍摄野生动植物,景深小, 有利于摄取虚实结合的影像,如人像摄影中的特写镜头多数会使用长焦镜头拍摄;压缩了近处和远处物体间的透视距离,使前后景物在画面上紧凑, 从而也压縮了空间透视关系,这当然也是一种影像层面的失真,这种变形属于枕形崎变,焦距越短越明显,但这种畸变像差很小,人眼完全可以接受。山东艺考摄影培训www.dysypx.com
    A telephoto lens also known as telephoto lens or telephoto lens, its focal length is greater than the diagonal of the camera frame, angle is smaller than a standard lens, focal length than a standard lens and long. Is a compact between Virtuality and reality combination characteristics of telephoto lens with a wide-angle lens is just the opposite. From the perspective of small, remote uptake King proud of a larger image and not easy to interference is taken, this is very suitable for long-distance shooting of wild animals and plants, small depth of field, there is conducive to the uptake of images, such as portrait photography in close-up majority use telephoto lens photography; compression of the near and distant objects perspective distance, before and after the scenery in the picture to compress the space perspective, this, of course, is also a kind of image distortion, the distortion pincushion distortion, focal length is shorter and more obvious, but the distortion aberration is very small, the human eye can accept.