Polarising effect. I'm not using any form of filters for my still photographs but I'm noticing the effect of what looks like polarisation of the sky on many of my panoramas.
At 90 degrees to the sun the blue of the sky gets progressively darker and more saturated, just the sort of effect that a polarising filter will give. Is there some form of polarising effect from the standard filter on the front of the P4P lens?
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