绝大多数卡片机安装在三脚架上,镜头光学轴心是偏离脚架轴心的。+ e% `" ~" ]$ M& V$ p2 `- Y
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1 E- U+ ~' M* g T/ Y而单反机一般是同轴的,偶尔有加装电池盒之后稍有偏差的情况。, S ]2 X' d/ i, L6 O* Y/ D
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