nicko_wen wrote:說真的,如果你不怕換...(恕刪) 50 1.8 光圈1.8~2.8室內用,光圈4.0~5.6室外用,省錢且畫質不差70~200 f4.0 L,畫質佳,室外拍人足以勝任淺見供參