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2. Flash Mode Button
4. Display Panel Illumination
The Speedlite 540EZ has three
firing modes: A-TTL/TTL automat¬
ic flash mode, Manual (M) flash
mode, and Stroboscopic
(MULTI)
flash mode. You can select the
desired mode by pressing the
flash mode button. Each press of
the flash mode button changes
the flash mode in the following
cycle:
A-TTL/TTL —> M (Manual flash) —> MULTI (Stroboscopic flash)
• A-TTL is automatically set when the camera is set to Full Auto mode, a
Programmed Image Control (PIC) mode, Program AE mode, or DEP mode. TTL
is automatically set in other camera shooting modes.
• When the flash head is set to a bounce position other than the 7° downward posi¬
tion, the flash mode is set to TTL regardless of the camera shooting mode.
3. Film Speed Setting
The film speed is set automatically according to the film speed set on the
camera. No setting is required on the flash unit.
The LCD panel is equipped with
an illumination function for viewing
in low light. When the display
panel
illumination
button
is
pressed, the LCD panel lights up
for approximately 8 seconds. To
turn off the illumination before the
8 seconds elapse, press the dis¬
play panel illumination button
again.
5. AF Auxiliary Light
With dark or low-contrast subjects, the flash unit automatically emits an
AF auxiliary light to help the camera focus the subject. The 540EZ's AF
auxiliary light is designed to correspond to the EOS-1 N's five focusing
points. The effective operating range of the AF auxiliary light is 0.5 - 15m
/ 1.7 - 49.5ft at the center and 0.7 - 6m / 2.3 - 19.8ft at the left and right
focusing point positions. Flash coverage is effective for lenses as wide as
28mm.
• Muiti-focusing-point EOS cameras with built-in flash units have built-in AF auxil¬
iary lights which override the 540EZ's AF auxiliary light.
• When the 540EZ is used with a camera that has only a single focusing point, only
the center AF auxiliary light is used.
• The AF auxiliary light is emitted only when the camera is set to One-shot AF
mode.
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