Through-the-Lens Flash Photography

PHOTOGRAPHY ADVANCED

THR— THE-OUGH

LENS- PHO FLASH

OGRAPHYT

To use TTL flash control, connect an SB-80DX, SB-50DX, or SB-28DX Speedlight to the camera and set the flash to D-TTL auto-flash mode. Depending on the type of lens used, one or more of the following TTL flash modes will be available. TTL flash control is available only with the SB-80DX, SB-50DX, and SB-28DX.

3D Multi-Sensor Balanced Fill-Flash for Digital SLR Multi-Sensor Balanced Fill-Flash for Digital SLR

This mode is available when a CPU Nikkor lens is attached. Based on information from the matrix metering system, flash output is adjusted to maintain a balance between the main subject and ambient background lighting. When the shutter- release button is pressed, the Speedlight emits a series of nearly invisible preflashes (monitor preflashes) immediately before the shutter opens. The monitor preflashes are reflected from objects in all areas of the frame and picked up by the camera’s TTL multi sensor, where they are analyzed instantaneously in combination with information on the current sensitivity (ISO equivalency) setting, aperture, lens focal length, and exposure compensation value. The results of this analysis are used to balance flash output with ambient light. When a type G or D lens is used, distance information is included in the calculation for still more precise flash control (3D multi-sensor balanced fill flash).

Center-Weighted Fill-Flash for Digital SLR

This mode is used with non-CPU lenses. When a non-CPU lens is attached, the camera automatically chooses center-weighted metering, allowing flash output to be roughly balanced with ambient lighting for the main subject and background. The camera may be unable to adjust exposure correctly if the frame includes a highly reflective object, or if the background is non-reflective. StandardTTL flash control is recommended in such cases. Standard TTL flash control is activated automatically when spot metering is selected.

Standard TTL Flash for Digital SLR

Standard TTL flash control is available with lenses of all types. Standard TTL flash control does not take the brightness of the background into account, instead adjusting flash output to ensure that the main subject is correctly exposed. This makes it suited to photographs in which the main subject is emphasized at the expense of other details, or when exposure compensation is used. This mode is also activated automatically when spot metering is selected.

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