Compatible Commercially Available External Flashes - Olympus CAMEDIA C-700 Ultra Zoom Reference Manual

External flash (Cont.)

Compatible commercially available external flashes

When selecting an extension 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 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 extension flash require that adjustments be made on the
extension flash unit.
If an extension 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 extension 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 extension flash unit or
calculate the distance in the manual mode and use it that way. However, generally,
8
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 extension 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 with additional communications functions
other than the 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.
180