Nikon Camera F3AF - Manual (Page 27)

FOCUS
The Nikon F3AF features a through-the-lens autofocus system
which takes the guesswork out of focusing: just point the camera
at what you want to photograph, depress the shutter release
button ® halfway, and watch the subject literally snap into sharp
focus... automatically.
The system consists of three parts: the special F3AF camera
body, the AF Finder DX-1, and an AF-Nikkor lens, either the
80mm f/2.8 or the 200mm f/3.5 IF-ED. The AF Finder DX-1 is
interchangeable and covers approx. 92% of the Image area of
the actual photograph, meaning that the final photograph will
be larger than the image seen in the viewfinder. The focusing
screen is built into the bottom of the viewfinder and cannot be
interchanged. Flowever, when other Nikon F3 interchangeable
viewfinders are used with the F3AF, you have a choice of 20
interchangeable focusing screens (refer to page 55).
Nikon’s autofocus system is unique in that it features exception­
ally quick response, allowing you to keep up with active, fast-
moving subjects.
The Nikon F3AF offers you three different ways of focusing:
l) autofocus, 2) focus-aid operation (using the focus indicators
inside the finder), or 3) manual focus (using the matte portion of
the focusing screen). As shown in the following table, however,
only AF-Nikkor lenses are usable for autofocus. With other lenses
having maximum apertures of f/3.5 and faster, you can use the
focus indicators as a guide in focusing as you manually rotate
the lens focusing ring в.
Note: Because of the cropping which occurs in the case of mounted
slides or regular snapshot-size prints, the actual picture might come out
slightly smaller than the image seen in the viewfinder.
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