Solution
The lens focus mode switch is set to ⋖MF⋗The subject is closer than the lens’s minimum focusing distance
An extender (sold separately) is used
Custom function settings are enabled
AF (auto focus) mode is set to One-Shot AF
AF mode is set to AI Servo AF
AF mode is set to AI FOCUS AF
This section explains what to do if the focus confirmation light does not light.
In the following cases, the focus confirmation light may not light.
The lens focus mode switch is set to ⋖MF⋗
If the lens focus mode switch is set to ⋖MF⋗, the AF mode can be selected, but the autofocus will not operate.
Set the lens focus mode switch to ⋖AF⋗.
The subject is closer than the lens’s minimum focusing distance
When you are too close to the subject (closer that the minimum focusing distance of the lens), the camera will not focus. Please move away from the subject to shoot. For more information on the minimum focusing distances for individual lenses, please check the lens specifications on the Canon homepage or in the product’s Instruction Manual.
Caution
Some lenses have indications such as ⋖ 0.25m / 0.8ft⋗ on them.
An extender (sold separately) is used
If a separately-sold extender is used together with a lens whose maximum lens aperture value is f/5.6 or higher, the autofocus will not operate.
*Support requirements may differ depending on the camera’s AF point specifications.
Check the maximum lens aperture value of your lens. In addition, see the instruction manual of your extender.
Custom function settings are enabled
If [Shutter/AE lock button] is assigned to something other than the default [AF/AE lock] function in the custom function (C-Fn) settings of the camera, the autofocus will not operate and therefore, the focus confirmation light may not light in certain settings even if the shutter button is pressed halfway.
Change the custom function setting by referring to the following list.
Custom Function Setting by Model | ||
Camera Models | Custom Function Number | Custom Function Setting (To cancel the setting, press 0.) |
EOS-1D X | C.Fn 5 | Check the custom settings. (*) |
EOS-1Ds Mark III | C.Fn IV -1 | 3 to 0 |
EOS-1Ds Mark II | C.Fn -04 | 1 to 0 |
EOS-1Ds | C.Fn -04 | 1 to 0 |
EOS-1D Mark IV | C.Fn IV -1 | 3 to 0 |
EOS-1D Mark III | C.Fn IV -1 | 3 to 0 |
EOS-1D Mark II N | C.Fn -04 | 1 to 0 |
EOS-1D Mark II | C.Fn -04 | 1 to 0 |
EOS-1D | C.Fn -04 | 1 to 0 |
EOS 5D Mark III | C.Fn 2 | Check the custom settings. (*) |
EOS 5D Mark II | C.Fn IV-1 | 3 to 0 |
EOS 5D | C.Fn -04 | 1 to 0 |
EOS 6D | C.Fn III | Check the custom settings. (*) |
EOS 7D Mark II | C.Fn3 | Check the custom settings. (*) |
EOS 7D | C.Fn IV-1 | Check the custom settings. (*) |
EOS 70D | C.Fn III-4 | Check the custom settings. (*) |
EOS 60Da | C.Fn IV-1 | Check the custom settings. (*) |
EOS 60D | C.Fn IV-1 | Check the custom settings. (*) |
EOS 50D | C.Fn IV-1 | 3 to 0 |
EOS 40D | C.Fn IV-1 | 3 to 0 |
EOS 30D | C.Fn -04 | 1 to 0 |
EOS 20Da | C.Fn -04 | 1 to 0 |
EOS 20D | C.Fn -04 | 1 to 0 |
EOS 10D | C.Fn -04 | 1 to 0 |
EOS REBEL T5i/EOS 700D | C.Fn IV C.Fn-6 | 1 to 0 |
EOS REBEL T4i/EOS 650D | C.Fn IV C.Fn-6 | 1 to 0 |
EOS REBEL SL1/EOS 100D | C.Fn IV C.Fn-6 | 1 to 0 |
EOS REBEL T3i/EOS 600D | C.Fn IV C.Fn-9 | 1 to 0 |
EOS REBEL T2i/EOS 550D | C.Fn IV C.Fn-9 | 1 to 0 |
EOS REBEL T1i/EOS 500D | C.Fn IV C.Fn-10 | 1 to 0 |
EOS DIGITAL REBEL XSi/EOS 450D | C.Fn IV C.Fn-10 | 1 to 0 |
EOS DIGITAL REBEL XTi/ EOS 400D DIGITAL | C.Fn -04 | 1 to 0 |
EOS DIGITAL REBEL XT/ EOS 350D DIGITAL | C.Fn -04 | 1 to 0 |
EOS REBEL T5/EOS 1200D | C.Fn IV C.Fn-8 | 1 to 0 |
EOS DIGITAL REBEL T3/EOS 1100D | C.Fn IV C.Fn-7 | 1 to 0 |
EOS DIGITAL REBEL XS/EOS 1000D | C.Fn IV C.Fn-9 | 1 to 0 |
AF (auto focus) mode is set to One-Shot AF
Depending on the shooting conditions, the camera may not focus and the focus confirmation light ⋖ ⋗ may blink even if the subject remains still. In this case, an image will not be captured when the shutter button is pressed completely. Please try recomposing the picture, or refer to the following methods for focusing the camera.
Caution
AF (Auto Focus) can fail to achieve focus on certain subjects such as:
AF mode is set to AI Servo AF
In Creative Zone modes (except for ⋖A-DEP⋗), the beeper will not sound even when focus is achieved.
Also, the focus confirmation light ⋖ ⋗ in the viewfinder will not light.
AF mode is set to AI FOCUS AF
When focus is achieved in the AI Focus AF mode with the Servo mode active, the beeper will sound softly. However, the focus confirmation light ⋖ ⋗ in the viewfinder will not light.