I have a 1100D canon camera which when i press the shutter button, nothing happens except the lens continuously tries to focus, but does not focus, thus does not allow picture to be taken. any suggestions??,
closed as unclear what you're asking by Philip Kendall, scottbb, Michael C, MikeW♦ Jan 1 '17 at 22:56
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I've observed with my camera that when I try to capture a dark image with higher than required shutter speed the auto focus keeps on focusing but image doesn't get captured. The thing I've noticed is the camera needs some light to capture the image. If it can't exceed it's threshold it won't allow you to capture it hence, no click.
Hope your lighting is correct.
This usually points to insufficient light for the camera to determine whether the lens is in focus.
Alternatively, teleconverters can also cause autofocus failures by making the lens's widest aperture be too small to let enough light in for proper focusing (particularly in low light, but sometimes even in bright light).
If neither of those is the issue, then your lens could have decentered optics that prevent it from ever getting the image properly in focus, or you could have something physically wrong with the actual AF sensor (mispositioned, loose, covered with dust, etc.), or you might have chosen some wildly incorrect AFMA (automatic focus microadjustment) settings.
The first things I would try are:
- Ensure adequate lighting
- Choose a smaller set of focusing points, and make sure they are on the subject
- Ensure that you are not closer than the lens's minimum focusing distance (typically 3–4 feet unless it is a macro lens)
- Ensure that you don't have serious smudges, cracks, chips, or scratches in the glass on either end of your lens
- Make sure you aren't seeing double-image problems caused by cheap window glass (or amazingly poor quality filters)
- Try a different lens
If all else fails, switch the lens to manual focus.
What is the aperture you are shooting at? Some cameras will have difficulty in locking the focus if you shooting at lower aperture like F7.1 or F9.
Try to move to a well-lit area where the contrast difference of the objects is clear. If the autofocus system is contrast detect AF, it will struggle to focus where there is not enough distinction between colors.
If none of the above works try manual focus and use shutter release button, to narrow dos the issue to lens or camera.