Nikon D70SBODY Flash Photography, Using the Built-in Speedlight, TTL Flash Control, Flash Mode

Flash Photography

Using the Built-in Speedlight

Taking Photographs—

The D70S is equipped with a Guide Number 15/49 Speedlight (ISO 200, m/ft; Guide Number at ISO 100 is 11/36). When a CPU lens is attached, the built-in Speedlight emits monitor preflashes that are analyzed using through- the-lens (TTL) technology (i-TTL flash control). The built-in Speedlight can be used not only when natural lighting is inadequate, but also to fill in shadows

and backlit subjects or to add a catch light to the subject’s eyes.

i-TTL Flash Control

The following types of flash control are available with CPU lenses:

Flash Photography

Flash control

i-TTL Balanced

Fill-Flash for

Digital SLR

Standard

i-TTL Flash for

Digital SLR

Description

i-TTL Balanced Fill-Flash for Digital SLR is selected automatically in all modes except mode M or when spot metering is selected in modes P, S, and A. Speedlight emits series of nearly invisible preflashes (monitor preflashes) immediately before main flash. Preflashes reflected from objects in all areas of frame are picked up by 1,005- pixel RGB sensor and are analyzed in combination with information from matrix metering system to adjust flash output for natural balance between main subject and ambient background lighting. If type G or D lens is used, distance information is included when calculating flash output.

Standard i-TTL Flash for Digital SLR is activated automatically in mode M and when spot metering is selected in modes P, S, and A. Flash output adjusted to ensure main subject is correctly exposed; brightness of background is not taken into account. Recommended for shots in which main subject is emphasized at expense of back- ground details, or when exposure compensation is used.

When a non-CPU lens is attached, the built-in Speedlight can only be used when Manual is selected for Custom Setting 19 (Flash mode; 150). If TTL selected, the shutter release will be disabled when the built-in Speedlight is raised. The flash-ready indicator () in the viewfinder and the icon and borders of the flash sync mode indicator in the control panel will blink.

19—Flash Mode ( 150)

Flash mode can be selected from TTL, Manual, and Commander mode. In Manual mode, the built-in Speedlight has a Guide Number (m/ft) of 17/56 (ISO 200) or 12/39 (ISO 100). Commander mode can be used for wireless off-camera flash photography with SB-800 or SB-600 Speedlights.

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