Re: EOS Non shiftable DEPTH mode (with DOF button pressed)

[F. Craig Callahan]

Pawel Nabe wrote:

> So with the EOS 600 when I want a little more or less DOF than
> the camera suggests I turn the dial, with the 1V pro body I have
> to remember the f-stop, put the lens in MF mode, switch to AV
> and dial in a modification of the remembered f-stop.

Why jump through all those hoops? While the range of apparent focus changes with
aperture, the ratio of DOF is relatively constant:  one third in front of the
plane of focus, and two-thirds behind. I don't bother with DEP--I simply focus
on an object about 1/3 into the scene (or that portion of the scene for which I
want apparent sharpness), compose, and shoot. (This is one reason I don't let
the camera select a focusing sensor.) I mostly shoot in Av mode so I've already
chosen the aperture that gives me the DOF I want. Quick and easy.

fcc

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