I just bought my first circular polarizing filter but I couldn't exactly see the effect of it. Therefore, could you explain to me a bit. My questions are
1. I have read that CPL is used to make the sky bluer. Does this also work for overcast day where blue sky is visible or is it just when the day is sunny?
2. On how to use CPL, I have read a thecnique of pointing your finger to the sun and see the direction of your thumb to get the direction of polarization? This seems to make sens when the sun is overhead what about if it's in a certain degree other than 90.
If you can point me to any pictoral tutorial, I would appreciate very much.