Nikon D2HS D2Hs User's Manual - Page 120

Taking Photographs-Flash Photography SB-80DX, SB-28DX, SB-50DX: D-TTL Flash Control The type of flash control used with the SB-80DX, SB-28DX, and SB-50DX depends on the lens attached: Lens Description 3D Multi-Sensor Balanced Fill-Flash for Digital SLR: Speedlight emits series of nearly invisible preflashes (monitor preflashes) immediately before main Type flash. Preflashes reflected from objects in all areas of frame are picked up G or D by five-segment TTL flash control sensor and analyzed in combination with lens range information from lens to adjust flash output for natural balance between main subject and ambient background lighting. Not available when spot metering is used. Multi-Sensor Balanced Fill-Flash for Digital SLR: As above, except that range information is not included in regulating flash output. Precision of Other calculation can be increased for non-CPU lenses by providing lens data (folenses cal length and maximum aperture; 121-124). Not available when spot metering is used. All types Standard TTL Flash for Digital SLR: Flash output adjusted to bring lighting in frame to standard level; brightness of background is not taken into account. Recommended for shots in which main subject is emphasized at expense of background details, or when exposure compensation is used. Standard TTL flash for digital SLR is activated automatically when spot metering is selected. 106