I believe this one was taken with an old 50mm f/1.4 manual focus lens! That's how I got a fast shutter speed, but focusing was not easy! Many other of my photos were taken with an inexpensive lens that has a maximum aperture of only f/6.3 at 300mm but somewhat larger at shorter ranges, affording me a shutter speed of only 1/60 s. in some cases! Anyway, I just ordered a Sigma 70-200mm f/2.8, so things will be easier for the 2007 rodeo!