 Sharon King |
Focus I have a Canon Digital Rebel 300D camera. I take a lot of portraits. I get good focus in manual mode if I only have one person I am photographing. The problem I am having is getting good clarity in all the faces of more than one person in a photograph. When I use Auto mode, I get mulitple red image sensor dots that appear and the focus seems fine. When in manual or any of the creative zone modes, I only get one red sonsor dot and that seems to be the only place in my image that I get a sharp focus. I have tried increasing my aperture some, but it still seemed that the only place I got sharp focus was were that red dot was. Does anyone have any suggestions. What should my aperature be set on with 2-3 people? What about 8 or more people? Should I be using manual focus instead of auto with more than one person? Thank you!
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Jon Close |
The lens can only be focused to a single distance. Subjects in front or behind that plane will progressively be more out of focus. The only way to have subjects at different distances from the camera to all appear in apparent focus is to use an aperture setting small enough (larger f-number) that they are covered by the depth of field. However, being within the depth of field does not mean that all subjects are in critical sharp focus, just close enough to distinguish key details. In the green box and "icon" exposure modes (Basic modes) the 300D will automatically select the focus sensor. If more than one sensor detects a subject at the same distance, then those several sensors will light. Otherwise, it is more common for only one sensor to light. In the Creative exposure modes (P, Av, Tv, M) you can select auto focus sensor selection just as in the Basic modes, or select a single sensor. The A-DEP mode uses auto AF sensor selection, but tries to determine the nearest and farthest subjects covered simultaneously by the 7 AF sensors. It then determines an aperture and intermediate focus distance that will include the near and far subjects within the depth of field.
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Sharon King |
Thank you Jon.
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