Canon 550EX User Manual download pdf (Page 17)

6. Pilot Lamp and Test Firing

Set the Speedlite's main switch to I .

• The flash will start charging When the flash

is ready, the pilot lamp lights

• Red pilot lamp

When the flash is fully charged, the pilot

lamp lights in red. For normal use, confirm

that the pilot lamp is red before taking the

picture

• Yellow pilot lamp

When the camera is set tor single shooting, a

yellow pilot lamp indicates a less-than-full

charge which enables a quick flash (see

description below). For close subjects which

do not require full-output flash, quick flash

shortens the recharging time

O To test the Speedlite, press the pilot

^ lamp (test firing button) to fire a test

flash.

• About Quick Flash

With the quick-flash feature, you can fire a flash even before the flash is fully charged. When the

pilot lamp is yellow, a quick flash can be fired The Guide No. for a quick flash is 1/2 to 1/16 that of a

normal flash. For details, see page 121

Quick flash cannot be fired in the following cases:

• When the Speedlite is used with a Type-B camera.

• The camera is set to continuous shooting Oli.

• FEB is used.

• In the manual flash mode or stroboscopic flash mode with the output set to 1/1 and 1/2.

• In the stroboscopic flash mode.

• When TTL Hot Shoe Adapter 3 is used with the Speedlite.

• When Custom Function CF-3 is set to 1 (TTL autoflash).

- The Speedlite cannot be test fired during the 6 sec. after you press the camera’s

shutter button halfway (while exposure metering is active).

• If the Speedlite is in the SE mode, pressing the test firing button turns on the

Speedlite.

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Canon 550EX User Manual Page 17