If it doesn't look sharp, focus is not likely to be in spec. So the bottom line is that focus should be within the DOF, or to put it another way, With slowerīodies reverts to the same as that of "consumer" bodies which don't have the On the "pro" bodies (EOS 1 series) focus spec for f2.8 and faster lenses (f4 on some models) is that it should be within 1/3 of the DOF. ![]() It should be within the DOF (Depth of Field). "consumer" bodies (such as the Digital Rebels and the EOS 20D/30D/40D) is that For example, Canon state that the spec for focus on Of course no manufacturer of cameras or lenses claims that autofocus isĪbsolutely perfect. May be due to technical problems with AF, but some are due to user error or unreasonable user expectations. ![]() Sometimes the focus point is in front of the intended subject and sometimes it's behind it. Part 5 - Focus Accuracy Check (for AF lenses)Ī common complaint seen on web photo forums is that cameras (and/or lenses) aren't achieving accurateįocus.
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