Wednesday, September 23, 2009

Accomplishing the Shot

For the four shots narrow depth of field, wide depth of field, short exposure, and long exposure with moving I have many different ideas.
For the narrow depth of field it is most often used for macro subject matter or for having one object stand out in a shot with the other details blurred. A narrow depth of field is accomplished by opening up the aperture and focusing in on the particular subject in mind. This will keep the subject (how much depends on how far the aperture is open) in focus and the surrounding area blurred. For this type of shot, if shot in daylight, it is important to make the shutter speed quite fast so that the colors or image is not washed out.
For a deep/wide depth of field the aperture is raised so that the opening is smaller. This increases the focus field. It is important to increase the shutter speed so it is not as fast as a narrow depth of field. Since the aperture is smaller more light is required to get the intended shot.
A short exposure requires a wider aperture in most cases since the shutter is not open for long light needs to be let in in some other way. A shorter shutter speed is signified by 1 over a large number. These are used to freeze motion.
And lastly a longer shutter speed with motion may require the panning motion. With a longer shutter speed the aperture should be smaller depending on the light. If it is late in the evening the aperture must be relatively wide open with a long shutter speed in order to allow as much light as possible into the shot, especially if it is shot at a low ISO. The longer shutter speed is good for running water shots.

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