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One of the first things you notice about a photograph is whether or not it is sharp. Extremely sharp photographs reveal a richness of detail, even more than you would normally notice in the original scene. If the entire image isn’t sharp, your eye is immediately drawn to the part that is.
When learning to control sharpness, the first goal is to get pictures sharp when you want them sharp. If your photos aren’t as sharp as you want them to be, you are probably experiencing one of the following effects:
- Focus. If nothing in your image is sharp or if your central subject is not sharp but other parts of the photograph are, your camera was improperly focused.
- Depth of Field. If your central subject is sharp but the background or foreground is less so, you probably didn’t use a small enough aperture to get the depth of field you wanted.
- Camera Movement. If the image is blurred all over, with no part sharp, the camera moved during the exposure. Some dots appear as lines and edges blur as the image is "painted" onto the moving image sensor.
- Subject Movement. When some of the picture is sharp but a moving subject appears blurred, the cause is too slow a shutter speed.
4.1 ELIMINATING CAMERA MOVEMENT4.2 SHARPNESS ISN'T EVERYTHING
4.3 HOW TO PHOTOGRAPH MOTION SHARPLY
4.5 CONTROLLING DEPTH OF FIELD
4.6 CAPTURING MAXIMUM DEPTH OF FIELD
4.8 CONVEYING THE FEELING OF MOTION