Cullmann D4500 manual AF Measurement Flash for Auto Focus, TTL Flash Control

ENG

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“AF” Measurement Flash for Auto Focus

The red “AF” light ray integrated into the flash unit supports the automatic focus setting of the auto focus TTL cameras. When the lighting conditions on hand are insufficient for the automatic setting of the focal width, the flash unit projects a red light ray onto the object as soon as the camera shutter is touched slightly. Then the auto focus of the camera adjusts to the object with the help of the red light ray.

TTL Flash Control

The flash unit receives its information solely from the connected TTL-controlled camera. The measurement of the lighting in TTL mode (TTL = ‘through the lens’) is conducted by the camera sensor.

This sensor measures the light that is reaching the film through the camera lens. An electronic control circuit inside the camera forwards a stop signal to the camera as soon as the film has received light; TTL mode means that all factors that influence the lighting of the film (such as filters, changes in the shutter or zooms with a variable shutter) are taken into consideration. You don’t have to concern yourself with the setting of the light emission. The camera’s electronic system automatically guides the necessary light quantity. Additionally, you can use measurement devices (e.g., spot, matrix or centered lighting measurement) that are provided in some cameras. To activate the TTL flash mode, gently tap the mode selector into the TTL position. The LCD display then shows “TTL”.

Manual Flash Mode with Full Light Emission

In order to use the flash unit with the full light emission, the mode selector must be placed into the M position (Manual). Then, every time the flash unit is activated, a flash with full energy takes place. The LCD display automatically provides the distance necessary for the correct lighting between the flash and the object. Adjustment to the individual shooting situation can be done by resetting the lens shutter or the focal width (on the camera). 5 levels can be selected for the “Energy Ratio”, 1/1, 1/2, 1/4, 1/8 and 1/16, by lightly tapping the mode selector when it is in the “M” position.

Synchronization of the Foreground and Background Lighting

The flash unit supports the synchronization of foreground and background lighting: Simply activate the Front or Rear mode.

With Canon, Konica, Minolta, Nikon and Olympus, the cameras control the synchronization of the foreground and background lighting, making it unnecessary to adjust the settings on the flash unit.

Swiveling Vertical/Horizontal Flash

Photos to be taken with a full flash are easily
recognizable due to their hard, dense shadows.
This is often accompanied by a sharp decline of
the foreground in the direction of the
background. This phenomenon can be
prevented with a swiveling flash. Because the
diffused light creates a soft, equally distributed
reproduction sharpness, the reflector is turned
upwards by up to 90° so that the flash is	ENG
returned by an appropriate reflection surface.
For color shots, the reflection surface must be
white or have a neutral color and be
unstructured. When swiveling the reflector,
ensure that no light falls directly from the
reflector onto the object. When you use the
swiveling flash, the zoom position clicks onto 50
mm, except in Manual mode.
Reflection Plate and Diffuser
The flash unit has an integrated reflection plate
and a diffuser. You can slide out the reflection
plate or the diffuser on the upper side, swivel
the flash head and use the reflection plate to
shoot photos with a heavy effect. The diffuser
can reduce the strong light, creating soft effects.
Using the diffuser is recommended to achieve
ideal results at close proximity (1 – 3 yards).

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