Contax T3 - Page 29

<Subjects Especially Liable to Focusing Errors>
The camera’s automatic focus mechanism may focus incorrectly,
or fail to focus at all, on the following kinds of subjects. In such
cases, use the focus lock function to lock the focus on another
object that is located at the same distance from the camera as the
desired subject, then move the camera to compose the subject as
desired and make the photograph.
• Subjects with low light or low contrast.
• Subjects composed of repetitive patterns.
• Dark subjects.
• Subjects composed of horizontal lines.
• Extremely bright or reflective subjects.
• Subjects in which a strong light source is located in or nearby the focus
frame, or when the sun or other strong light source is in the picture
frame.
• Compositions where two objects located at extremely different distances
are both inside the focus frame.
• Subjects moving at high speed.