background image

14

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

Summary of Contents for Mecablitz 34 AF-3 C

Page 1: ...TV VIDEO CAMCORDER MECABLITZ MECABLITZ 34 AF 3 C Operating instructions...

Page 2: ...cameras The following pages give details for the correct operation of the mecablitz flashgun and summarize its fields of application Please read these operating instructions carefully even if at first...

Page 3: ...control 27 4 3 Correct exposure indication 27 4 4 Information displayed in the camera s viewer 28 5 TTL flash control 29 5 1 E TTL flash control 30 6 Flash synchronisation 31 6 1 Normal synchronisati...

Page 4: ...nd high humidity levels Do not keep the flashgun in the glove compartment of a car In the event of flash shots with full light output observe an interval of at least 3 minutes after a series of 20 fla...

Page 5: ...itz if the flashgun is not going to be used for a prolonged period 2 2 Loading and exchanging batteries Turn off the flashgun with the main switch Press the unlocking catch slide the battery compartme...

Page 6: ...ff to save power approximately 8 minutes after the flashgun was switched on the last flash was fired tripping the camera release or switching on the camera light metering system The green flash ready...

Page 7: ...this function A full power flash is fired if the camera does not feature TTL flash control In other words Without TTL flash control the mecablitz fires an unmeasured flash at maximum output If there i...

Page 8: ...he exposure may be incorrect if the camera control circuit has already changed over to flash sync speed Please refer to the camera s operating instructions for further details 4 2 Automatic flash sync...

Page 9: ...ra specific deviations ar possible please refer to the camera s operating instructions blinks Indicates that flashgun should be used or switched on on some cameras illuminated The flash is ready for u...

Page 10: ...re zooms are taken into account You need not worry about adjustment of the light output The camera s electronic system automati cally defines the required amount of light You can also utilize various...

Page 11: ...evel is transmitted and adjusted on the flash unit as a result of this measurement The aperture and shutter speed to be used are established by the camera according to the ambient light before the act...

Page 12: ...a model Please refer to the camera s operating instructions for further details 6 2 Second curtain synchronisation REAR Some cameras offer the facility of second shutter curtain synchronisation First...

Page 13: ...2 Special functions not supported by flash Depth of field DEP The depth of field auto mode is not operative when the flashgun is switched on Exposure is then completed as in the auto program mode Soft...

Page 14: ...uit 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 au...

Page 15: ...ic fill in flash Some cameras offer the facility of activating auto matic fill in flash control or automatically trigger a fill in flash Fill in flash will soften harsh shadows and diminish the contra...

Page 16: ...ent identified with a T is included for telephoto lenses of 85 mm focal length PLEASE NOTE The use of the wide angle diffuser diminishes the effective range of the flash Mounting and removing the atta...

Page 17: ...lashgun for approx 10 minutes every 3 months and to fire a few flashes The batteries must supply sufficient power to light up the flash ready light within one minute after the flashgun was switched on...

Page 18: ...m 12 Technical data Guide number ISO 100 21 34 with telephoto attachment 28 without attachment 20 with wide angle diffuser Lighting for 35mm camera from 35 mm focal length onwards with wide angle att...

Page 19: ...maximum lighting distances in different ISO aperture combinations The sticker can be applied to the back of the flashgun Lighting distances 400 m W 20 T 20 5 7 10 14 20 28 200 3 5 5 7 10 14 20 100 2 5...

Reviews: