ND Filter
During my last trip to Yosemite I decided to try using an ND Filter throughout my trip. At the suggestion of Ken Rockwell, I went for the Tiffen 77mm ND .6 filter – pretty cheap off of amazon. I guess you could describe it as sunglasses for your lens. It helped to bring down the shutter/aperture to a more “normal” range for one so that I didn’t have to have crazy shutter speeds to compensate for the brightness of the scene.
But I think the best usage for me was capturing some of the incredible waters of Yosemite. The ND filter allowed me to really dial down my shutter to something like 1/8 or 1/5 so that I could capture some great pics of water flowing and looking slightly surreal and ghostly. Of course, this would have been ideal with a tripod but I made the best of it I could.

