The SWM ensures smooth, discrete auto focusing and the non rotating front element enables the use of lens mounted flash accessories like the SB-R1C1 Macro Lighting kit.是什么意思_The SWM ensures smooth, discrete auto focusing and the non rotating front element enables the use of lens mounted flash accessories like the SB-R1C1 Macro Lighting kit.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句