Polarizing filters test.
Some of you might be interested in reading this Polarizing filters test at Lenstip.com.
EDIT: See chapter 2 for why we don't use linear polarizers on DSLR cameras.
Ron - 'We don't have time to go take pics this afternoon Carl.'
Carl - 'What do you mean? It will only take 1/1000s.'
'Keep your eyes looking forward. However, glance back now and then to see where you've come from. It will put a smile on your face.' ~ brandrx