Had some fun this past week with a rented 600mm lens in the Smokies and at the Hiwassee WR. The lens takes some getting used to and the lighting conditions weren't always the best, but I got a few images that I'm not too ashamed of.

I rented from lensrentals.com and, based on the cost of renting vs buying and the frequency that I need that long a lens, renting seems to be the way to go.