背景柔和,锐度优异:索尼这款100mm镜头将这两者完美地结合在一起。不过有点儿问题。这个问题在哪儿呢?如果全开光圈值f/2.8,镜头表现如何?或者光圈值为f/5.6的时候,相机效果怎样?答案是:两种情况效果都很好!从物理学角度和景深角度来说,这款Sony镜头是一枚拥有最大f/2.8虚化强度和f/5.6同级进光量——也就是T5.6的定焦镜头。因为镜头使用了变迹滤镜,简称APD。虽然镜头的进光量会受到这枚镜片的影响而降低,但是其他方面都是优点了:高清晰度,少量的失 Soft background, sharpness: this 100mm Sony lens will be the perfect combination of both. But a little problem. What is the problem? If the full aperture value of f / 2.8, the lens performance? Or aperture value of f / 5.6 when the camera effect? ​​Answer: both cases are good results! From a physics point of view and depth of field From the angle of view, this Sony lens is a fixed-focus lens with maximum f / 2.8 blur and f / 5.6 level of input - that is, T5.6. Because the lens used apathetic filter, referred to as APD. Although the amount of light entering the lens will be reduced by this lens, others are an advantage: high definition, a small amount of loss