We get lots of heavy grey skies here in Ireland that I'm having trouble coping with. While the light is flat and uninteresting, my biggest problem is metering where the sky forms part of a picture. A 'correct' exposure removes any detail from the cloud while the subject/foreground is underexposed, metering for the subject or foreground blows the sky out completely, exposing for cloud detail leaves everything else far too underexposed to do anything with. Would a polarizing filter help with this problem? And if so, does it actually reduce the amount light into the lens? It's very frustrating, as waiting for the sun can take a long time round here. Any suggestions would be very welcome.