Olympus SP-350 - Manual (Page 168)

Accessories (optional)
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Appendix
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 settings on the camera.
(4) Even if the auto F value and ISO 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.
(5) Use a flash whose illuminating angle covers the angle of view of the lens.
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, 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 an Olympus FL series flash 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.
Using commercially available external flashes