Nikon AF-P DX NIKKOR 10-20mm f/4.5-5.6G VR Руководство пользователя - Страница 6
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■ Reproduction Ratio
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The reproduction ratio is the ratio of the apparent size of an
object to its true size. If, for example, the image on the image
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sensor is one-third of actual size, the reproduction ratio is 1 : 3.
If desired, the reproduction ratio can be selected using the
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reproduction ratio indicator.
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Example: Using the Reproduction Ratio Indicator
To shoot at a reproduction ratio of 1 : 3, select manual focus
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and rotate the focus ring until the focus distance mark aligns
with the number "3" in the reproduction ratio indicator, then
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move the camera forward or back until the subject is in focus.
■ Close ups and Reproduction Work
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To prevent blur caused by camera shake, mount the camera
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on a tripod and use a cable release or remote cord. Close ups
are generally associated with extremely shallow field depths;
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for greater depths of field, stop down the lens, choose longer
exposure times, and position the camera so that the focal
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plane is parallel to the portion of the subject you wish to
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photograph. When using a lens hood, be careful that the
hood does not touch the subject.
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■ Exposure Factor
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The lens f-number indicates the brightness of the subject at a
focus distance of infinity; higher reproduction ratios result in
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reduced subject brightness. The actual brightness is referred
to as the "effective f-number", and the amount that exposure
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compensation has to be raised to account for the loss in
brightness as the "exposure factor".
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Id
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