Flash Control Mode
In P, S, A, and M modes, the flash control mode for the built-in flash can be selected using the Flash control > Flash control mode (built-in) option in the photo shooting menu. The options available vary with the item selected.
The options available for Repeating Flash > Times are determined by flash output.
|Output||Options available for “Times”|
|1/64||2–10, 15, 20, 25|
|1/128||2–10, 15, 20, 25, 30, 35|
Flash Control for Optional Flash Units
When an optional flash unit is connected, the Flash control > Flash control mode (built-in) option in the photo shooting menu changes to Flash control mode (external).
Flash Control Mode
In i-TTL flash control, the camera sets the flash level based on light reflected from a series of nearly invisible preflashes (monitor preflashes) emitted immediately before the main flash fires. The camera supports the following i-TTL flash control modes:
- i-TTL balanced fill-flash for digital SLR: Preflashes reflected from objects in all areas of frame are picked up by 180K-pixel (approximately 180,000-pixel) RGB sensor and are analyzed to adjust flash output for natural balance between main subject and ambient background lighting. If type G, E, or D lens is used, distance information is included when calculating flash output. Not available when spot metering is used.
- Standard i-TTL fill-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 i-TTL fill-flash for digital SLR is activated automatically when spot metering is selected.
Aperture, Sensitivity, and Flash Range
Flash range varies with sensitivity (ISO equivalency) and aperture.
|Aperture at ISO equivalent of||Approximate range|
|1.4||2||2.8||4||5.6||8||11||16||0.7–8.5||2 ft 4 in.–27 ft 10 in.|
|2||2.8||4||5.6||8||11||16||22||0.6–6.0||2 ft–19 ft 8 in.|
|2.8||4||5.6||8||11||16||22||32||0.6–4.2||2 ft–13 ft 9 in.|
|4||5.6||8||11||16||22||32||—||0.6–3.0||2 ft–9 ft 10 in.|
|5.6||8||11||16||22||32||—||—||0.6–2.1||2 ft–6 ft 10 in.|
|8||11||16||22||32||—||—||—||0.6–1.5||2 ft–4 ft 11 in.|
|11||16||22||32||—||—||—||—||0.6–1.1||2 ft–3 ft 7 in.|
|16||22||32||—||—||—||—||—||0.6–0.8||2 ft–2 ft 7 in.|
In mode P, the maximum aperture (minimum f-number) is limited according to ISO sensitivity, as shown below:
|Maximum aperture at ISO equivalent of:|
If the maximum aperture of the lens is smaller than given above, the maximum value for aperture will be the maximum aperture of the lens.
For information on:
- Locking flash value for a metered subject before recomposing a photograph, see “FV Lock” (0 FV Lock).
- Enabling or disabling auto FP high-speed sync and choosing a flash sync speed, see A > Custom Setting e1 (Flash sync speed, 0 Flash Sync Speed).
- Choosing the slowest shutter speed available when using the flash, see A > Custom Setting e2 (Flash shutter speed, 0 Flash Shutter Speed).