Metz 28 AF-4 N operating instructions Autofocus measuring flash

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 pat- tern 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 exposure mode or AF mode of the camera. In most cases, it will only support the SINGLE-AF function (see camera’s operating instructions) without follow-up focusing.

•The range of the autofocus measuring flash depends on the speed of the lens (maximum aper- ture)! With an f/1.8 standard lens of 50 mm focal length, the range is approx. 6-10 m (depending 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 measuring flash!

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