Nikon 40mm-f-28G-AF-S-DX-Micro-Nikkor: ■ Reproduction Ratio ■ Close ups and Reproduction Work ■ Exposure Factor
■ Reproduction Ratio ■ Close ups and Reproduction Work ■ Exposure Factor: Nikon 40mm-f-28G-AF-S-DX-Micro-Nikkor
Table of contents
- For Your Safety
- ■ Parts of the Lens
- ■ Attaching and Removing the Lens ■ Focus
- M/A (Autofocus with Manual Override) The Focus Limit Switch ■ Aperture ■ Depth of Field
- ■ Reproduction Ratio ■ Close ups and Reproduction Work ■ Exposure Factor
- ■ Changes to the Effective f-number ■ Built-in Flash Units ■ The Lens Hood
- ■ Lens Care ■ Supplied Accessories
- ■ Compatible Accessories ■ Specifications
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■ Reproduction Ratio
The reproduction ratio is the ratio of the apparent size of an
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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.
Example: Using the Reproduction Ratio Indicator
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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.
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■ Close ups and Reproduction Work
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
photograph.
When using a lens hood, be careful that the
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hood does not touch the subject.
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■ Exposure Factor
The lens f-number indicates the brightness of the subject at a
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focus distance of infinity; higher reproduction ratios result in
reduced subject brightness.
The actual brightness is referred
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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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