最近用17-40拍摄的，不sharp，不知是否没有IS和没有tripod的原因。

来源: 于 2012-12-01 20:24:54 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

Just bought the book: digital photography: recommend to use tripod, low iso and remoter.

17-40 mm has no IS, could cause some shaking, which result in subtle blurry, not sharp.