Sigma EM-140DG Instrucciones página 25

Aperture Priority Setting
By selecting the Av mode of your camera, the camera will select the appropriate shutter speed for the
background. 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 may be exposed correctly, but the background will become under or overexposed.
When used with M Mode
You can set the desired shutter speed and aperture value. The sync speed of camera is 30sec. If you
adjust exposure according to the exposure meter indication, the camera will work as for Daylight
synchronization flash or slow synchronization.
LIMITS OF CONTINUOUS SHOOTING
To prevent overheating of the flash's circuitry, please do not use your Flash unit for at least 10minutes after
using the number of flash exposures, shown in the below table have been made in quick succession.
TTL, M(1/1,1/2)
M(1/4, 1/8)
M(1/16-1/32)
MANUAL FLASH OPERATION
Manual flash provides adjustment of desired flash intensity (flash output level).
 This mode cannot be used with EOS 700, 750, 850 cameras.
 The shooting in Manual Mode requires a very advanced technique.
We recommend you use the Auto mode. When using Manual Flash
photography, first take some test shots. It will be beneficial to use a
flash meter device for determining the exposure.
 Flash intensity of left and right tubes can be set between 1/1~1/64. It is
also possible to set without firing one of them.
1. Set the camera's exposure mode to M.
2. Press the MODE button on the flash unit to select M.
3. Press the SEL button. (The flash intensity display of the left flashtube blinks).
4. Press the + or
" -- " is displayed, the left flashtube will not fire).
5. Press the SEL button. (The flash intensity display of right flashtube will blink).
6. Press the + or
" -- " is displayed, the right flashtube will not fire).
7. Press the SEL button to stop the indicator blinking.
 If the flash output level values of both tubes are the same, the flash
output level will be displayed. When the different flash intensity is set,
the flash output level will not be displayed on the LCD.
 Regarding Guide Number, please refer to the [Table.1] on the last page.
 You can calculate the correct exposure by using the following formula:
Guide Number "GN" / Flash to Subject Distance = F-stop
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 closes, 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. It will be a more natural effect.
Mode
Multi
- button to set the left flashtube output level. (If
- button to set the right flashtube output level. (If
Number of Flash Exposures
15 Continuous Flash Shots
20 Continuous Flash Shots
40 Continuous Flash Shots
10 Cycle
24