视角是一个光学名词,就是通常所说的可视角度,是指位于某点相对于外界的能够成像的最大角度。据科学家测定,可视角度左右是水平对称的,但上下可视角度要小于左右可视角度。它直接应用于摄影上的一个例证就是:小镜头具有大视角,随着焦距变大,视角会变小。小镜头能拍出大范围的风 Perspective is an optical noun, which is commonly referred to as the viewing angle, refers to the maximum angle at which a point can be imaged relative to the outside world. According to the determination of scientists, horizontal and horizontal viewing angle is symmetrical, but up and down the viewing angle is less than the left and right viewing angle. An example of how it applies directly to photography is that small lenses have a large viewing angle and the viewing angle gets smaller as the focal length becomes larger. Small lens can shoot a wide range of wind