Nikon D90 User Manual page 289

Exposure
ISO 200 – 3200 in steps of
ISO sensitivity
(Recommended 1 EV (ISO 100 equivalent) below ISO 200 or to approx. 0.3, 0.7, or 1 EV (ISO
6400 equivalent) above ISO 3200.
Exposure Index)
Active D-Lighting Can be selected from Auto, Extra high, High, Normal, Low, or Off
Focus
Autofocus Nikon Multi-CAM 1000 autofocus module with TTL phase detection, 11
focus points (including one cross-type sensor), and AF-assist illuminator
(range approx. 0.5–3 m/1 ft. 8 in.–9 ft. 10 in.)
–1 – +19 EV (ISO 100, 20 °C/68 °F)
Detection range
Lens servo • Autofocus (AF): Instant single-servo AF (AF-S); continuous-servo AF (AF-C);
• Manual (M): Electronic rangefinder can be used
Focus point Can be selected from 11 focus points
AF-area mode Single-point, dynamic-area, auto-area, 3D-tracking (11 points)
Focus lock Focus can be locked by pressing shutter-release button halfway (single-
servo AF) or by pressing AE-L/AF-L button
auto AF-S/AF-C selection (AF-A); predictive focus tracking activated
automatically according to subject status
1
/ EV. Can also be set to approx. 0.3, 0.7, or
3
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