All of these were taken with the "beast", the 600mm f/4 ED-IF AIS with the TC-300 teleconverter except the last one. Everything is shot @ f/5.6 so the depth fo field is paper thin. The microprism is very crisp with just the prime lens but you have to use the ground glass with the teleconverter. It too is very discriminating, especially if you have a specular highlight like a catchlight in their eye or some glint of water on their beak. I simply love that combination for closeup nature photography when you cannot get within 100 feet of your subject! A tripod is an absolute must, most especially if you use the teleconverter. The lens is simply too heavy (14 lbs w/o the TC-300 and 15 bs w/ i) to hand hold, especially since you have to focus it manually, though all it takes is your thumb to do it.
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