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18
FOCUSING - continued
Infrared Photography Film-Plane Indicator
The plane of sharpest focus for infrared light is slightly more distant than its counterpart for visible light as seen through the camera’s viewfinder. Thus, for sharpest focus in infrared photography, adjustments must be made.
To compensate for this shift in focus, first focus the image sharply through the viewfinder. Then, turn the focusing ring counterclockwise until the point focused is aligned with the red dot (or line) provided on the lens barrel. For example, in the picture below, the lens has been focused for infinity (no) infrared shooting. Note that when lenses having a focal length of 50mm or less are used stopped down to f/8 or below, no adjustment is necessary due to the large depth of field available.
Note: Some new optics using Nikon’s Extra-low Dispersion (ED) glass, as well as reflex (catadioptric) lenses, do not require refocusing for infrared photography. Refer to individual lens instruction manuals for details.
U nder various precision shooting situations, such as close-up photography, it is often necessary to measure the film-to-subject distance to ensure the sharpest focus. The camera’s film plane is indicated by the top edge of the figures making up the serial number at the upper left of the camera body. Note that these figures are 46.5mm from the front surface of the camera’s lens mounting flange.
(bayonet mount front surface)
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Table of contents
- 5 Foreword
- 6 Preparation for use
- 6 Installing the batteries
- 6 Checking the batteries
- 7 Loading the film
- 8 Prior to shooting
- 9 Memo holder
- 9 Setting the film speed
- 10 Operation of camera controls
- 10 Setting the shutter speed
- 10 Setting the aperture
- 11 Film-advance lever
- 11 Frame counter
- 12 Self-timer
- 13 Unloading film
- 14 Holding the camera
- 15 Shutter release operation
- 15 Operation via cable release
- 16 Focusing
- 18 Infrared photography
- 18 Film-planeindicator
- 19 Depth of field
- 19 Depth-of-field preview lever
- 20 Depth-of-field indicators
- 22 Exposure measurement
- 22 Determining degree of exposure
- 24 Exposure control
- 24 Metering range
- 25 Extreme low-light metering
- 25 Time exposure
- 26 Eyepiece shutter operation
- 26 High-contrast lighting
- 28 Stop-down exposure measurement
- 30 Exposure compensation adjustment
- 30 Adjustment for focusing screens
- 32 Adjustment for film compensation
- 33 Multiple exposures
- 33 Mirror lockup.
- 34 Flash synchronization
- 35 Ready-light.
- 35 Finder illuminator
- 36 Tips on camera care
- 38 Changing the lens
- 39 Coupling lever lock/release operation
- 40 Changing the view finder
- 41 Changing the focusing screen
- 42 Focusing screen selector guide
- 43 Focusing screen selector chart
- 44 Accessories
- 46 Features/Specifications