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枫下拾英
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摄影艺术
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请问前辈,镜头上的(f/2.8L IS USM)L,IS,USM分别代表什么意思,谢谢!!
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camp
(大本营);
2006-10-29
(#3291442@0)
L 表示豪华,IS 表示图像稳定,USM表示超声波马达。详情见内。
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meadow
(Meadow);
2006-10-31
{866}
(#3295109@0)
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