Autofocus Nikon Advanced Multi-CAM 3500FX Autofocus Sensor Module with TTL Phase Detection, Fine Tuning and 51 Focus Points Including 15 Cross-type Sensors, f/8 Supported by 11 Sensors, Contrast-detect AF Anywhere in Frame Camera Selects Focus Point Automatically When Face-priority AF or Subject-tracking AF is Selected, Detection Range -2 to +19 EV ISO 100, 20°C, AF-area Mode Single-point AF, 9-, 21- or 51- Point Dynamic-area AF, 3D-tracking, Group-area AF, Auto-area AF, Face-priority AF, Wide-area AF, Normal-area AF, Subject-tracking AF, Focus Lock Focus can be Locked by Pressing Shutter-release Button Halfway Single-servo AF or By Pressing the Center of the Sub-selector
Focus Type Fast Hybrid AF (Phase-detection AF/Contrast-detection AF), Focus Point 425 Points (Phase-detection AF)/169 Points (Contrast-detection AF), Focus Sensitivity Range EV-1 to EV20 (ISO100 Equivalent with F2.0 Lens Attached), AF Mode Automatic AF (AF-A), Single-shot AF (AF-S), Continuous AF (AF-C), Direct Manual Focus (DMF), Manual Focus, Focus Area Wide (425 points (Phase-detection AF), 169 points (Contrast-detection AF)), Zone, Center, Flexible Spot (S, M, L), Expanded Flexible Spot, Lock-on AF (Wide, Zone, Center, Flexible Spot (S, M, L), Expanded Flexible Spot), Focus Type with LA-EA3 Phase-detection/Contrast-detection Selectable, Features Lock-on AF, Eye AF, Focus Lock, Eye-Start AF and AF Micro Adjustment (Both Only Available with Optional LA-EA2 or LA-EA4 Attached), AF Illuminator (Built-in, LED Type, Range Approx 0.30 to 3 m), AF On