Nikon D100 Product Manual - Page 85

Taking Photographs-Focus Controlling How the Camera Focuses Getting Good Results with Autofocus Autofocus does not perform well under the following conditions: There is little or no contrast between the subject and the background The focus area contains objects at different distances from the camera An example would be a subject the same An example would be a subject inside a color as the background. Use focus lock cage. Use focus lock ( 70) to focus on ( 70) to focus on another subject at the another subject at the same distance, then same distance, then recompose the photo. recompose the photo. The subject is dominated by regular geometric patterns The focus area contains areas of sharply contrasting brightness An example would be a row of windows An example would be a subject that is half in a skyscraper. Use manual focus ( 74). in the shade. Use manual focus ( 74). 73