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Difficult Subjects of AF(Auto Focus in Eoa 500D or t1i)

Wednesday, November 25, 2009

AF (Auto Focus) can fail to achieve focus (the focus confirmation light blinks) on certain subjects such as the following:

  • Low-contrast subjects. (ex. blue sky, solid-color walls, etc.)
  • Subjects in low light.
  • Extremely backlit reflective subjects. (ex. car with a reflective body)
  • Overlapping near and far objects. (ex. animal in a cage)
  • Repetitive patterns. (ex. Skyscraper windows, computer keyboards, etc.)

In such cases, do either of the following:
  • Focus on an object at the same distance as the subject and lock the focus before recomposing. Please see NOTE below about "focus".
  • Set the lens focus mode switch to and focus manually.


auto focus in eos 500d or t1i, all the explanations are given for your easy reference, so enjoy



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posted by DSLR MASTER, 3:42 PM

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