Canon 550EX Instrukcja Użytkownika Pobierz pdf (Strona 97)

p Use the following formula to calculate

^ the required shutter speed.

Flash count Firing frequency

= Shutter speed

Example: If the flash count is 10 and

the firing frequency is 5 Hz, the

shutter speed will have to be at

least 2 sec.

10-5 = 2

• If the flash count display Is * - , the flash will

keep firing until the shutter speed ends or

until the maximum number of continuous

flashes (as indicated in the table on page

122) is fired.

0 Focus the subject.

• To set the exposure settings, see “Manual

Flash Mode” on page 93

Stroboscopic Flash

S.& i •

Check that the i icon is displayed in

the viewfinder, then take the picture.

To prevent overheating and deterioration of the flash head, do not use stroboscopic flash

for more than 10 frames in rapid succession. After 10 frames, allow the 550EX to cool for

at least 10 minutes.

• Stroboscopic flash is most effective with highly reflective subjects in front of a dark

T'lli'T background.

• Using a tripod and Remote Switch are recommended.

• Using an external power source is recommended for stroboscopic flash

Stroboscopic flash cannot be used at a flash output of 1/1 or 1/2.

buLb can also be used with stroboscopic flash.

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Canon 550EX Instrukcja Użytkownika Strona 97