<p> Believe me,you don't want anything to do with a polarizer on your GSW, I'd have to search my photos to show you an example of what happens to the sky ( it was with a 50mm lens on my Mamiya 7 and their polarizer, probably the best attempt of making a polarizer user friendly on a rangefinder )<br>
A grad filter , well, that kinda depends on how critical the start of the gradation has to be.<br>
Regards,Peter</p>