Title: That's Why It is Cheap
Review: It's cheap for two things:1. A good filter would only block the polarized light, reduce the reflection. This cheap filter has its side effects by shifting the color cast to blue at maximum point and then to greenish when rotated for another 180 degrees.2. A good filter would almost completely block out polarized light at maximum. You can test it in front of a bright LCD monitor and at maximum, a good CPL filter will go completely dark. This cheap filter will only block half; you can still see what's on the LCD screen (and like mentioned above, it's blue tinted too).
Is this product review negative?