I just bought myself a brand new Canon 24-70mm F/2.8. I was hoping I could get some advice from the pros on what type of lens filters I should invest in. I'll be deploying to northern Japan for about six months and I plan to shoot outdoors in the cold and snow a lot. I also plan on going to the annual cherry blossom festival in the spring. I don't know if this environment would have an impact on the decision or not. I also have a future interest in experimenting with HDR. I was thinking of just a general UV filter for protection purposes, but I would also like something that I can get creative with as this will be my new walk around lens upgrading from the T2i Kit lens. Any suggestions?