Thanks, This ia a great video. Two questions: 1. What do you consider a wide angle lens for the sky rule? 2. I have been told that using a polarizer with an ND will generally improve video, particularly on a sunny day. Thoughts on that?
Similar to what Ian said at the end (if you like it use it, if you don't then don't), I'd also add that I've heard many landscape photographers occasionally say that they don't use full polarization in forest scenes, to leave a bit of sheen on foliage since they like the look. So partial polarization is a consideration as well.
Just to clarify a bit, in nature, light is polarized by scattering or reflection. Scattering is what happens in the sky and is the basis of the 90° rule. This applies only to the sky. Polarization by reflection can be uneven, but this is based on the Brewster's Angle effect, which has a maximum effect for reflections at about 55°. Wikipedia has entries for both. BTW, if you want to preview the effect of a circular polarizer, you must look through the filter from the camera side.
From the side with the threads ... CPOLs have a linear polarizer on the front end that is the actual polarizer. Behind that is a quarter wave plate that produces the circular polarization. If you have a CPOL just try looking at reflections on leaves through both sides, turning the filter to see the effect. @@watkinsphoto
Very nice video
Excellent summary!
Thanks, This ia a great video. Two questions: 1. What do you consider a wide angle lens for the sky rule? 2. I have been told that using a polarizer with an ND will generally improve video, particularly on a sunny day. Thoughts on that?
Similar to what Ian said at the end (if you like it use it, if you don't then don't), I'd also add that I've heard many landscape photographers occasionally say that they don't use full polarization in forest scenes, to leave a bit of sheen on foliage since they like the look. So partial polarization is a consideration as well.
Just to clarify a bit, in nature, light is polarized by scattering or reflection. Scattering is what happens in the sky and is the basis of the 90° rule. This applies only to the sky. Polarization by reflection can be uneven, but this is based on the Brewster's Angle effect, which has a maximum effect for reflections at about 55°. Wikipedia has entries for both. BTW, if you want to preview the effect of a circular polarizer, you must look through the filter from the camera side.
Can you explain what looking through the filter on the camera side means?
From the side with the threads ... CPOLs have a linear polarizer on the front end that is the actual polarizer. Behind that is a quarter wave plate that produces the circular polarization. If you have a CPOL just try looking at reflections on leaves through both sides, turning the filter to see the effect. @@watkinsphoto