Sigma ELECTRONIC FLASH EF-610 DG SUPER EO-ETTL II (キヤノン用): LIMITS OF CONTINUOUS SHOOTING

Aperture Priority Setting

By selecting the Av mode of your camera, the camera will select the appropriate shutter speed for the

scene. If the subject is too bright or too dark, the shutter speed indicator will blink and show the limit

(highest or slowest shutter speed) value. The highest shutter speed will be limited to the camera’s

normal flash synchronization speed. In such a case, the camera proceeds to take a flash photograph

at the limit value. Thus, the main subject in a picture should be exposed correctly, but the background

may become under or overexposed.

When used with M Mode

You can set the desired aperture value and shutter speed from 30 seconds to the camera’s flash sync

speed. If the camera’s exposure requires more light to achieve correct exposure for the inputted

values, the flashgun will provide sufficient light to give the correct exposure, within the working range

of the flashgun.

LIMITS OF CONTINUOUS SHOOTING

To prevent overheating of the flashgun’s circuitry, do not use your flash unit for at least 10 minutes

after continuously firing the flash for the number of exposures shown in the table below.

Mode Number of Flash Exposures

TTL, M(1/1,1/2) 20 Continuous Flash Shots

M(1/4, 1/8) 25 Continuous Flash Shots

M(1/16-1/32) 40 Continuous Flash Shots

Multi 10 Cycle

MANUAL FLASH OPERATION

Manual flash is provided for shooting subjects when the correct exposure is difficult to obtain in the

TTL mode. In the manual flash mode, you can set the flash power level from 1/1 (full) to 1/128 power

in one step increments.

1. Set the camera’s exposure mode to M.

2. Press the MODE button on the flash unit to select M.

3. The flash power output value blinks when you press the SEL

button.

4. Press

+

or

-

button to set the desired flash power output.

5. The manual flash output display will stop blinking and remain

displayed after you press the SEL button again.

6. Adjust the focusing by pressing the shutter button, note the subject distance on the focus ring on the

lens. Then adjust the lens’ aperture value or flash power level until the distance indicated on the LCD

panel of the flashgun is equal to the subject distance.

7. When the Ready Light of the flash is illuminated, the unit is ready for use.

◆ You can calculate the correct exposure by using the following formula:

Guide Number “GN” / Flash to Subject Distance = F-stop

This flash unit will automatically calculate and indicate the appropriate subject distance according to

the above formula.(Please refer to table1 on the last page)

SECOND CURTAIN SYNCHRONIZATION

When you photograph a moving subject with slow synchronization, usually the furrow of the subject

will be exposed in front of the subject. The ordinary flash light will fire when the first shutter curtain is

fully opened, thus the subject will be exposed from the time flash is fired to the time the shutter is

closed (First curtain synchronization). When you use second curtain synchronization, the flash will fire

just before the second curtain begins to close and the subject will be exposed by ambient light from

the time the shutter opens until the flash fires. As a result the furrow of the subject will be recorded

behind the subject. This is a more natural effect.

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