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INFRARED PHOTOGRAPHY
In infrared photography, the plane of sharpest focus is
slightly more distant than the one produced by visible light.
As a rule of thumb, you can compensate for shift in focus
by referring to the curved red infrared index engraved be-
tween the depth-of-field scale lines on the lens barrel.
After sharply focusing the subject through the viewfinder,
check the focused distance and turn the focusing ring to the
left until the prefocused distance figure is aligned with the
infrared index. Then attach the filter to the lens and take
the picture.
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SPECIFICATIONS
Focal length: 35mm-105mm
Maximum aperture: f/3.5-4.5
Lens construction: 16 elements in 12 groups
Picture angle: 62°-23°20'
Distance scale: Graduated in meters and feet from 1.4m
(5ft) to infinity (°°); macro focusing mode at any focal
length setting; at 35mm setting, down to 0.27m (0.9ft)
Focusing/zooming control: Via a single control ring; focus-
ing is done by rotating the ring, zooming by sliding it in
or out; reference marks for focal length settings of
35mm, 50mm, 70mm and 105mm are provided; focusing
in macro mode is accomplished by sliding the focusing/
zooming ring in or out
Rotational angle: 87° 36' down to 1.4m
Macro focusing function: Via a macro ring while pushing
the macro button; operable at any focal length/focusing
setting; at 35mm setting, close focusing down to 0.27m
(0.9ft) is possible; maximum reproduction ratio is 1:4
Aperture scale: f/3.5-f/22 on both standard and aperture-
direct-readout scales
Diaphragm: Fully automatic
Exposure measurement: Via full-aperture method
Mount: Nikon bayonet mount
Attachment size: 52mm dia. (P=0.75)
Dimensions: Approx. 64mm dia x 86.5mm extension from
flange; approx. 95mm long (overall)
Weight: Approx. 510g
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