Re: 580EX II Zoom Range
"The flash is adjusting to the FOV of the lens, not the FOV of the sensor."
That is exactly what I am addressing; the flash does not adjust to the FOV of the lens based in the size of the sensor of the camera in use as Canon claims.
Page 21 of the 580EX II manual states that "the Speedlight recognizes the EOS DIGITAL camera's image size and automatically sets the flash coverage for lens focal lenghts from 24 to 105." I am not experiencing this feature with the Canon 40D and 16-35 mm L II when set at 35 mm.
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