Originally posted by titrisol For the LX it does not matter.
Not quite. The LX meters uses a sub mirror to reflect light to the meter for manual exposure, and this can be thrown off by use of a linear polarizer.
I believe, but may be wrong (I don't have my technical manual handy) that even in auto exposure, the OTF metering which isn't affected by a linear polarizer doesn't come into play until the indicated shutter speed is below the X-Sync speed.
If this is correct, then a linear polarizer can affect auto exposures as well.