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variable neutral density filter
释义
variable neutral density filter
Encyclopedia
艺术学
彩色黑白兼用滤光镜
释
variable neutral density filter
可变中性密度滤光镜
通过转动滤光镜上的调节环,可连续均匀改变其通光能力的滤光镜。又称可调减光镜、POL退光镜(Pol Fader),B+W公司称其为双偏振镜(Double Polarizer)。
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