Now that I have an assortment of backyard bird feeder's, I have a couple of hawks dropping by for lunch and dinner. So, I thought I would try out my Canon 100-400mm EF IS zoom lens with a 1.4x teleconverter on them. Most of these images were taken at ISO's ranging from 200 to 1000 and at full telephoto zoom (trying to push the limits on my 1D MKII and the lens.)