Dörr DAF-34 Notice D'utilisation page 15

which offers the possibility of changing
the direction of the flash head vertically
up to 90°. By directing the flash head
towards a reflecting surface you avoid
frontal flashing of your object. The
indirect flash offers the following
advantages:
• Harsh shadows can be avoided
• Red-eye reduction
• Soft, diffused and equal illumination
• Reduction of light reflections from
shining surfaces such as eyeglasses
or windows.
The angle can be read from the chart on the back of the flash
head. Please take into consideration that the distance by indirect
illumination no longer equals the distance between camera and
object. Correct distance is measured from flash to reflecting
surface and then to object. The TTL flash mode will control these
distances automatically.
Red-Eye Reduction
Red eyes which you see in some pictures are caused by the
reflection of the flash light in the eye's retina. This effect mostly
happens when the flash is directed almost parallel to the optical
axis and is intensified by low light situations whereby the pupil
of the eye is widen. The best way to eliminate red eyes is indirect
flash. But even with usage of direct flash the design of the DÖRR
DAF-34 helps in reducing the red-eye effect as the flash head is
located as far as possible from the optical axis of the camera.
The larger the incident angle of the flash light, the less red-eye
effect will appear. Some camera models from Pentax, Nikon and
Olympus offer an additional pre-flash which reduces the red-eye
effect. These pre-flash functions are supported by the DÖRR
DAF-34. For more detailed information refer to the instruction
manual of your camera.
TTL Flash Mode
After the flash is properly mounted on your camera, switch
the camera on, select the automatic program mode and then
switch the flash unit to ON.When the flash READY light glows
you need only press the shutter release button to start taking
pictures. The TTL auto flash mode automatically controls the
required light of camera and flash for correct exposure of your
object. The flash light is reflected from the object and measured
through the lens (TTL) onto the film surface. When the correct
exposure has been measured, a stop signal is transmitted to
the flash. The incorporated thyristor circuitry then interrupts the
light transmission and ignites the flash. Simultaneously the best
aperture and exposure time will be set at your camera. The TTL
auto flash mode offers a highly precise exposure and is easy to
handle. And in addition the following advantages are given: 15