I was playing around with Auto ISO in Av mode when this guy appeared.
With the 300/2.8 and 1.4tc in Av mode and auto ISO the Camera returns a shutter speed of either 1/640 or 1/800 sec which seems reasonable to me for hand-holding (with I.S. on).
Camera: 7D
Lens: 300/2.8 + 1.4tc
Shutter Speed: 1/800
Aperture: f5.6
ISO: 250
Metering Method: Evaluative - (Ev + 2/3)
Support: Hand held
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