How do I get focus confirmation while manually focusing on a Canon 5D Mark II?
Asked 3/10/2011
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When I manually focus on a Canon 5D Mark II, can the camera show a focus-confirmation light or indicator? If so, how is it enabled, and are there cases where it will not work?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
15y ago
2 Answers
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Focus Confirmation is automatic, and should happen on a 5D with all Canon EF lenses.
There are several situations, however, in which the confirmation light may not work. The focus confirmation uses the auto focus (AF) system, so any time that AF is not possible the confirmation light may fail.
Canon has a document that explains these situations in detail but I will list several common ones here.
- AF is not possible due to low contrast.
- An extender/lens combination decreases the maximum aperture past f/5.6, which is beyond the limit for AF.
- The shutter/AE Lock button custom function setting is changed, which can effect AF
Originally by user67. Source · Licensed CC BY-SA 4.0
user67
15y ago
0
Generated from our catalog & community — verify before relying on it.
On the Canon 5D Mark II, focus confirmation is normally automatic with Canon EF lenses—you do not turn it on separately. While manually focusing, half-press the shutter (or otherwise activate AF) so the camera’s AF system can check focus; when focus is achieved, the confirmation indicator should light.
It may not work in some situations because the confirmation relies on the autofocus system. Common cases include:
- the subject has too little contrast
- the effective maximum aperture is slower than f/5.6, such as with some lens/extender combinations
- custom button settings have changed how AF is activated
- you are using a third-party adapted lens/adapter that does not provide the needed electronic communication
So, with a standard EF lens and normal AF activation, it should happen automatically during manual focus.
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