Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2022-08-11 14:29:13

Live View Settings With Canon DSLRs

Canon Live View has no auto-stop-down feature, so Live View is at maximum aperture, which is what you want for accurate focusing (under extremely bright conditions the lens might be stopped down without any indication except a faint sound).

For example, setting a Canon 5D Mark II at aperture f/8, then entering Live View mode, the lens remains wide open, for easy and accurate focusing (with Nikon, you’re looking at f/8, and focusing is hopeless until you switch to a wider aperture). While awkward, you can use the stop-down button to focus at a smaller aperture. In my usage, 99% of the time the Canon approach is perfect.

There is one exception to the wide-open behavior: under very bright conditions, the Canon Live View implementation stops the lens down, and there is no indication whatsoever that it is doing so. This can lead to more difficult focusing because of increased depth of field, and if focus shift is present, assumptions might be upended. On the flip side, stopping down 1-2 stops can make focusing easier under some conditions; it all depends. They key is being aware of it.

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Intrigued? See Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges, or (one topic of many) field curvature.

Canon 5D Mark II settings for Live View

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