Olympus C-2500L - Manual (Page 52)

E-46
Connecting a non-exclusive Extension Flash
Non-exclusive Extension Flash That Can Be Used with This Camera
Use the flash (sold separately) designed specifically for the Camedia C-2500L if possible. If you want to use non-exclusive
extension flashes on the market, extension flashes must satisfy the following conditions in order to be used with the Camedia
C-2500L.
• When the extension flash is used, the flash intensity must be controlled from the extension flash side. If used in the auto
flash mode, the extension flash must use an F stop of F2.8 (applicable with normal shooting mode) or F5.6 (applicable with
macro mode) as its auto flash mode.
• Depending on photographic conditions, a suitable exposure may not be obtained even when using an extension flash at
F2.8 or F5.6. In such case, change the flash's F stop or ISO rating, or set the guide number figured out from the focal dis-
tance in the manual mode. In any case, F-stop in the auto flash mode and ISO rating generally are adjusted in 1 EV incre-
ments, and exposure cannot be compensated any less than this. When using an extension flash, the camera's exposure
compensation feature cannot be used.
• The angle of illumination must cover the range of a lens with 35-mm focal length (when converted into 35-mm film).
However, with wide close-ups, it is recommended to use a flash with a wide adapter for distributing light because the lower
part of the image does not come out sometimes.
• A full flash must last no more than 1/200 of a second. With ring flashes of long flash duration, part of the light might not be
included in the exposure.
• Connecting a non-exclusive extention flash with communicating function which does not meet the contditions above may
damage the camera or flash.
NOTE
When a commercially available extension flash is used in the “P” or “A” mode with low ambient light, the shutter speed is
reduced and picture blur may occur. When using a flash under low light conditions, we recommend using the “M” mode and
setting the shutter speed between 1/40 and 1/100.