Through-The-Lens Flash Photography - Nikon D1 Manual

Through-the-Lens Flash Photography

When the SB-28DX Speedlight (available separately) is attached to the D1 and
set to TTL (through-the-lens) mode, it automatically selects a flash mode
designed for the D1 (TTL mode is only available when the SB-28DX is
attached). The following settings are available:
3D multi-sensor balanced fill-flash for D1
Multi-sensor balanced fill-flash for D1
This mode is available when a CPU lens is attached. Matrix metering is
used to balance flash output with ambient lighting for the main subject and
background. When the shutter-release button is pressed, the SB-28DX
emits a series of nearly invisible preflashes (monitor preflashes) that are
reflected from objects in all areas of the frame and picked up by the
camera's five-segment TTL multi sensor. This information is analyzed in
combination with such data as the camera's sensitivity (ISO equivalency)
setting, aperture, focal length, and exposure compensation value. Based
on this information, the flash output level is automatically compensated to
balance flash output with ambient light. When a D-Type lens is attached,
distance information is added to the calculation for still more precise flash
control (3D multi-sensor balanced fill-flash).
Center-weighted fill-flash for D1
This mode is used with non-CPU lenses. When a non-CPU lens is
attached, the camera automatically chooses center-weighted metering,
and consequently flash output is roughly balanced with ambient lighting for
the main subject and background. If the frame includes a highly reflective
object, or if the background is non-reflective, the camera may be unable to
adjust exposure correctly. In such cases, standard TTL flash control can
be used. Standard TTL flash is automatically selected when spot metering
is used.
Standard TTL flash for D1
Standard TTL flash control is available with all lens types. Standard TTL
flash control does not take the brightness of the background into account,
but adjusts flash output so that the main subject is correctly exposed. This
makes it suitable for photographs in which the main subject is emphasized
at the expense of other details, or when you are using exposure compen-
sation with flash photography. This mode is automatically selected when
spot metering is used.
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Flash Photography: Through-the-Lens Flash Photography