Nikon 2200, 7MAA800-02 Reproduction Ratio, Close ups and Reproduction Work, Exposure Factor

■Reproduction Ratio

En 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 sensor is one-third of actual size, the reproduction ratio is 1 : 3. If desired, the reproduction ratio can be selected using the reproduction ratio indicator.

Example: Using the Reproduction Ratio Indicator

To shoot at a reproduction ratio of 1 : 3, select manual focus and rotate the focus ring until the focus distance mark aligns with the number “3” in the reproduction ratio indicator, then move the camera forward or back until the subject is in focus.

■Close ups and Reproduction Work

To prevent blur caused by camera shake, mount the camera on a tripod and use a cable release or remote cord. Close ups are generally associated with extremely shallow field depths; for greater depths of field, stop down the lens, choose longer exposure times, and position the camera so that the focal plane is parallel to the portion of the subject you wish to photograph. When using a lens hood, be careful that the hood does not touch the subject.

■Exposure Factor

The lens f-number indicates the brightness of the subject at a focus distance of infinity; higher reproduction ratios result in reduced subject brightness. The actual brightness is referred to as the “effective f-number”, and the amount that exposure compensation has to be raised to account for the loss in brightness as the “exposure factor”.

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