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2.2 Shutter priority S
In the camera mode „S“ any shutter speed can be
set on the camera. The camera will then automati-
cally select an aperture to match the ambient light
conditions.
2.3 Aperture priority A
In the camera mode „A“ an aperture can be pre-
selected on the camera. The camera will then au-
tomatically adjust a shutter speed that matches
the ambient light conditions.
When selecting the aperture ensure that the sub-
ject is within the working range of the flash unit
(see aperture calculator or the flash unit’s LC dis-
play).
2.4 Manual M
An aperture and a shutter speed can be preselect-
ed on the camera when in “M” mode.
When selecting the aperture ensure that the sub-
ject is within the working range of the flash unit
(see aperture calculator or the flash unit’s LC dis-
play).
3. Flash modes
3.1 TTL flash mode
The TTL mode is an automatic flash mode where
flash exposure metering is performed by a sensor
inside the camera. TTL flash operation with an
Olympus digital camera is a flash mode with auto-
matic determination of the guide number or partial
light output, on the basis of preflash technology.
Fractions of a second prior to exposure, one or two
invisible pre-flashes are fired, depending on the
given camera type.
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