Using An External Flash; Exposure Compensation - FujiFilm GA645 Professional Owner's Manual

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2. Flash covering area (Fig. 46)
* Light fall-out (Fig. 46-A)
* External flash covering area (in the case of flashes
with different vertical and horizontal covering
angles) (Fig. 46-B)
* Covering area of 6 x 4.5 cm version (Fig. 46-C)
* Covering area of STROBE GA (Fig. 46-D)
In the case of an external flash with different vertical and
horizontal covering angles (lighting features) the flash
covering area and the direction of an image plane may not
coincide.
To solve light fall-off we recommend that you use a com-
mercially available STROBE GA.
EXPOSURE COMPENSATION
1. Set the exposure compensating value (Fig. 47)
If you want to take high-key or low-key pictures, use expo-
sure compensation in the programmed auto exposure or
aperture-priority auto exposure mode.
1) While pressing in the Exposure Compensation Button
(+/—), 2) turn the Up/Down Dial. (3 The exposure compen-
sating value will be displayed in the LCD in 0.5 EV-step
increments. The compensating range is + 2 EV.
2. Display of the compensating value (Fig. 48)
Ifyou press in the Exposure Compensation Button )+/-(
after setting the compensating value, only the " ₪ " Sign
will be displayed to tell you that the camera is set for expo-
sure compensation. If you then press the Shutter Release
The guide number of the built-in flash (with the maximum
amount of light) is 12 at ISO 100. It will increase by 1.4
times if the film speed (ISO) becomes double, and double
if the guide number increases four times.
e The farthest flash distance is calculated by dividing the
guide number by the lens F-number at full aperture (F4
with this camera).
|
Guide number
Flash distance =
а
‫ ו ו‬‎ the camera is set to the aperture-priority auto expo-
sure mode, calculate the maximum flash distance with
the aperture being set.
e Because negative films have a wider exposure latitude,
the flash ranges are longer than those in the above
table.
USING AN EXTERNAL FLASH
1. Mount the flash (Fig. 45)
Attach a commercially available hot-shoe type external
flash such as STROBE
GA to the Hot-Shoe
of the
camera.
e Do not use flashes designed for cameras of other mak-
ers that have a signal pin because mounting and dis-
mounting may become impossible.
e As the camera is set to the low speed shutter in a dark
place in the A mode, blurred pictures are liable to be
made. We recommend that you use your camera in the
M mode.
HSITON3

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