尽管变焦镜头有着无可比拟的方便之处,但是定焦镜头的优秀画质却是变焦镜头无法企及的。所以才有人说,真正的摄影大师,是用一只定焦镜头走天下的。对于人像摄影而言,标头更是必不可少的。标头不仅有定焦镜头的高光学素质优势,而且这类镜头一般来说有很大的口径,这更有利于暗光摄影和虚化背景。 Although the zoom lens has an unparalleled convenience, but the excellent quality of the fixed-focus lens is zoom lens can not match. Therefore, some people say that the real master of photography is to take the world with a fixed-focus lens. For portrait photography, the header is even more essential. The header not only has the high optical quality advantages of a fixed-focus lens, but also such lenses in general have a large aperture, which is more conducive to dark light photography and blurred background.