It has a wide-aperturelens to capture as much light as possible, and the technology requires no clunky auto-focus mechanism. It adjusts exposure time automatically.
它的大光圈镜头可以摄入尽可能大的光量，所用技术并不需要笨重的自动对焦系统，曝光时间也是自动调节。
2
What some of us DSLR users don't realize until we've grown enough is just how wondrous and useful a good 50mm lens with a wideaperture is.