Display panel illumination, Af auxiliary light – Canon 540EZ User Manual
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4. Display Panel illumination
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.
• Multi-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