Olympus E-100RS E-100RS Instructions (English) - Page 116
Usable commercially available external flashes
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Shooting with an external flash (Cont.) Usable commercially available external flashes When selecting an extension flash, use products which meet the following basic conditions. (1) 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. (2) 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, 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 6 extension flash photography.) (3) Use a flash which is capable of covering an illumination angle for a 32 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. (4) 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. (5) 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. 116