I've mastered birds in flight (not!) so I've turned to bees. I was lucky to get these little guys within the DoF of my 500 with 1.4 tc attached at f6.3!
I cloned out some OOF forsythia at LR and ran some NR on BG.
Canon EOS 50D, 500 mm f4L x 1.4 tcII = 700 mm
capture date: Tuesday, 12 May 2009
exposure program: Aperture Priority
ISO speed: 400
shutter speed: 1/2000
aperture: f6.3
exposure bias: +0.0
metering: Pattern
flash: OFF
John, Superb timing on this and a fascinating shot. If this were mine I would remove the top buds only to accentuate the flying bees because the plants direction is leading you out of the frame.