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原帖由 gerence 于 2012-2-16 23:38 发表 
和固定的ND不一样么?
Quality cost $.
method 不一样.
Putting two cheap polarizers together. some even made by cheap PLASTIC. you have to consider ... vignetting, sharpness, color cast ...
Why brother to do that ? you spend good money on your lens, but then put a cheap filter on top to downgrade the quality.
Quality or Mobility. I pick Quality, as I got all the time when I am doing landscape.
I only need one ND400 (instead of a range from 2-400) and it will work for most need.
[ 本帖最后由 hkfroggy 于 2012-2-17 09:55 编辑 ] |
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