SueMe82
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I also suggest you get one linear and one circular polariser. Depending on the design the linear one on the outside will allow you much greater consistency and the true ability to get 100% blackness.
Two circular polarizers would not work unless the front one was the wrong way round, nor would a circular in front of a linear.
Here's a test.
If your first circular polarizer is mounted with the delay plate in front of the polarizer it will have no effect as a polarizer - ie it won't affect the sky or reflections as it is rotated. This is, in fact, the best way of making a variable ND that has no polarizing effect. One circular polarizer backwards, then one forwards.
Best,
Helen
So what you are saying, is when I used two circular polarizing filters for a test last Summer, I was only using one? :lmao:
I understand what you are saying and the why, I just don't see how the filter is polarizing and unpolarizing and making any difference if there's only one? Wouldn't it remove the effects, and make the filter do nothing in that case as well.