Having problems with your Canon EOS Digital Rebel XTI Digital Camera ?

Autofocus gives erratic results

\015 The autofocus of my digital rebel xti (Canon, aka 400D) is giving me erratic results: the focus shifts swiftly a couple of times, then halts but not in focus, often even wildly out of focus. I use an Canon EFS 17 - 85 mm lens. The problem is least apparent on the widest angle (17 mm) and persistent on the narrowest angle (85 mm).\015\012\015\012Any clues as to what is causing this problem?\015\012Thanks!\015\012\015\012Hein\015\012The Netherlands\015

Answers :

Are you using this indoors, in low light perhaps? This would be the most common reason for this happening. The only way to get around that is to use a "faster" lens, such as f2.8 / f1.8 / f1.4 etc.
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\015\012If not, try cleaning the lens and camea contacts with a plastic eraser, make sure no debris falls in the camera body (hold upside down for this).
Repair Help & Product Troubleshooting for Canon EOS Digital Rebel XTI Digital Camera

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