Originally Posted by
Manfred M
The 90 degree issue with a polarizer is related to darkening the sky only.
When dealing with reflection, the position, shape and reflectivity of the subject come into play and as you have pointed out, you've aleady cut the reflections. Different brands / models of polarizers seem to work differently. Some seem to be designed to minimize light loss, which impacts the amount of reflection that they remove, while others are more brute force and cut the light (and reflections) more sigificantly. I shoot both B+W and Tiffen polarizers and both produce slightly different results in the same lighting conditions.