28 AF-4 C TV VIDEO CAMCORDER Operating instructions

8. Autofocus measuring flash

The integrated AF red-light beam of the mecablitz

supports the automatic focusing of autofocus TTL

cameras. When the prevailing light is insufficient for

automatic focusing, the mecablitz will project a

pattern of red vertical stripes onto the subject as

soon as the camera’s release is lightly. The camera’s

autofocus system then focuses the picture by this

striped pattern.

Notes:

• When the camera’s autofocus system is on, the

electronic circuit will automatically activate the

autofocus measuring flash whenever the prevai-

ling light is insufficient for the exposure.

• The autofocus measuring flash cannot be

activated in every operating or autofocusing mode

of the camera. It only supports focusing priority

(one-shot AF: see camera’s operating instruc-

tions). Use of the autofocus measuring flash is not

possible with shutter release priority (Al Servo AF)

• Depending on the camera type, either the AF

illuminator of the camera or that of the flashgun

will be activated whenever the autofocus measu-

ring facility becomes necessary.

• The range of the autofocus measuring flash

depends on the speed of the lens (maximum

aperture)! With an f/1.8 standard lens of 50 mm

focal length, the range is approx. 6-10 m (depen-

ding on the sensitivity of the camera’s AF sensor).

Low-speed lenses, e.g. with an aperture of

f/5.6 or f/8 (such as zoom lenses), significantly

restrict the range of the autofocus measu-

ring flash!