V1.02
Thom Hogan’s Complete Guide to the Nikon D300
Page 604
Summary of i-TTL Flash Modes
Flash LCD
Displays
Exposure Modes
Metering
Modes
TTL Type
Performed
TTL BL
Program,
Aperture, Shutter,
Manual
Matrix,
Center-
weight
Balanced Fill
Flash (shutter
speed capped
at 1/250)
TTL
Program,
Aperture, Shutter,
Manual
Spot* Standard
TTL
(shutter speed
capped at
1/250)
TTL BL FP
Program,
Aperture, Shutter,
Manual
Matrix,
Center-
weight
Balanced Fill
Flash (no cap
on shutter
speed)
TTL FP
Program,
Aperture, Shutter,
Manual
Spot* Standard
TTL
(no cap on
shutter speed)
*Standard TTL mode is set automatically when you select this
option.
Note: TTL flash modes can also be changed (if the camera isn’t set
to Spot metering) by using the
Mode
button on the external
flash. In other words, if you see
TTL BL
on the flash LCD,
pressing the
Mode
button selects
TTL
instead.
One final note on sync speeds: the D300 also provides a
setting in Custom Setting #E1 of
1/320 (AUTO FP)
. This acts
like the
1/250 (AUTO FP)
mode with one exception: flash
units that do not support FP will sync at 1/320 instead of the
usual 1/250 (and default) limit. This includes the internal
flash.
Non-TTL Flash Modes
In the TTL flash modes just described, the
D300
performs all
the calculations necessary to adjust the flash output level.
When you press the shutter release, the camera tells the flash
when to start firing and when to stop. The flash simply follows
the camera’s orders to turn on and off. Three remaining flash