AUTOFOCUS
The Nikon N90 has two autofocus modes, Single Servo AF with Focus-Priority and Continuous Servo AF with Release-Priority. In either autofocus mode and in any film advance mode, Focus Tracking automatically activates when the subject starts moving. Focus Tracking enables the camera to analyze the speed of the moving subject according to the focus data detected, and to obtain correct focus by anticipating the subject'sposition-and driving the lens to that position-at the exact moment of exposure. You can thus obtain correctly focused pictures for many moving subjects.
Data Link System users
You can give Focus-Priority to Continuous Servo AF and/or Release-Priority to Single Servo AF.
For Single Servo AF in continuous shooting, you can also cancel focus detection and lens driving for the next shot after the first shot is taken so that the subject focus remains locked.
For details, see the Nikon AC-1 E card'sinstruction manual.
Caution
Do not attempt to tum the lens focusing ring or impede its rotation when the focus mode selector is set to S or C.
In addition to AF Nikkor lenses (including D-type AF Nikkor and AF-I Nikkor lenses except the AF Nikkor lenses for F3AF), autofocus is possible with AF Teleconverter TC- 16A attached to non-AF AI-Nikkor lenses with a maximum aperture of f!3.5 or brighter. AI -Nikkor lenses that cannot be used with the TC-16A are:
•AI-S type 20mm 1/2 .8
•AI-S type ED 400mm 1/2.8 IF
•AI-S type ED 400mm 1/3.5 IF
•28mm 1/2 (with lactory serial No. 540020 or smaller)
•28mm 1/2.8 (No. 500000 or smaller)
•35mm 1/1.4
•35mm 1/2 (No. 931000 or smaller)
•35mm 1/2.8 (No. 880000 or smaller)
•50mm 111 .4 (No. 398000 or smaller)
•50mm 1/2 (No. 364000 or smaller)
•ED 400mm 1/3.5 IF
•Micro 55mm 1/3.5
•All modified-AI-Nikkor and PC-Nikkkor lenses
For details, see the TC-16A 'sinstruction manual.
