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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 touched.
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
prevailing light is insufficient for the exposure.
• The autofocus measuring flash cannot be activa-
ted in every operating or autofocusing mode of the
camera. It only supports focusing priority (one-
shot AF: see camera’s operating instructions). Use
of the autofocus measuring flash is not possible
with shutter release priority (Al Servo AF).
•
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 sen-
sor).
Fig. 5: AF red-light beam
AF red-light beam