Hey All... I'm looking into my first dSLR (Nikon D50) and I wanted to get some filters. I was a bit surprised how many different filters are available so I was wondering if anyone knew of a site that explained the different types and showed examples of them in use. Maybe a pic filtered/unfiltered... you get the idea. Any ideas? Also along these same lines... any filters you'd recommend as a 1st buy? I use a polarizing filter via adapter on my P&S cam so I figured that would be the first one.