Olympus C-750 Manuel d'utilisateur télécharger pdf (Page 67)

External flash (optional)

Flash

Compatible commercially available external flashes

When selecting an external flash, use products which meet the

following basic conditions.

(1) Some flashes available on the market operate with a high voltage synchro

terminal. If one of these is used, it may damage the camera, and/or the

camera may not function normally. Contact the manufacturer of the flash

you are using concerning the specifications of the flash’s synchro

terminal.

(2) Some flashes available on the market have the polarity of the synchro

terminal reversed. In this case, even if the flash is connected, it will not

fire. Contact the manufacturer of the flash for more information.

(3) Exposures when using an external flash require that adjustments be

made on the external flash unit. If an external flash is used in the auto

mode, match it with the F value and ISO sensitivity settings on the

camera.

(4) Even if the auto F value and ISO sensitivity of the external flash are set to

the same conditions as those on the camera, depending on the

photographic conditions, it is possible that the correct exposure may not

be obtained anyway. In such a case, adjust the auto F value or ISO value

on the external flash unit or calculate the distance in the manual mode

and use it that way. Generally, however, the auto F value and ISO value

can only be adjusted 1 step and beyond that, exposure compensation

cannot be made. (Exposure compensation in the camera is made invalid

in external flash photography.)

(5) Use a flash which is capable of covering an illumination angle for a 38 mm

or larger lens when calculated for 35 mm film. However, in close-up

photography with the lens on the wide setting, the bottom of the image

may not expose correctly. The ideal is to have a wide angle adapter to fit

on the flash and spread the illumination angle so it is wider.

(6) Use a flash unit with a flash time of 1/200 sec. or less when using the flash

at full strength. For devices with a long flash time, such as a ring flash, a

portion of the light emitted will not contribute to the exposure.

(7) If a flash unit or other accessory TTL flash that has additional

communications functions other than the FL-20 or FL-40 is used, it

may not only fail to function normally, but may also cause damage

to the camera’s circuitry. Do not use such a device.

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Olympus C-750 Manuel d'utilisateur Page 67