Nikon 2174 user manual Depth of field, Focusing at a predetermined reproduction ratio

9. Depth of field

• Approximate depth of field can be	Depth of field scale
	A Distance index
determined by checking the depth of
field scale.		En
• Using the aperture stop-down button
of the lens or the camera’s depth-of-
field preview (stop-down) button (with
the D3 or D300 camera), the depth of
field can be observed while looking
through the camera viewfinder.
• For more information, see p. 248.	Fig. 11
Note: When the lens is tilted, neither
the depth of field scale nor the distance scale can be used.
(Both scales can be used when the lens is shifted only.)

10.Focusing at a predetermined reproduction ratio

The reproduction ratio is the relation between the size of the image recorded on film and the actual subject size. If, for example, the image on the focusing screen is one-fifth the actual subject size, the reproduction ratio is 1:5.

To obtain the appropriate reproduction ratio for each focused distance, see the table on page 248.

11.Notes on close-up photography and duplication work

Camera shake

The PC-E Micro NIKKOR 45mm f/2.8D ED provides such exceptionally high image magnification that even the slightest movement during shooting can cause the image to blur. Be sure to mount the camera on a tripod and use a cable release or remote cord to release the shutter.

Close working distance

At the high reproduction ratios used in close-up shooting, the depth of field is very shallow. To ensure greater depth of field, stop down the lens, then carefully position the camera to ensure the most important surface of the subject is in the same zone of sharp focus.

29