Canon Speedlite 90EX Instruction Manual - Page 31
The slave unit flash does not fire., The power turns off by itself., The picture is underexposed or
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The slave unit flash does not fire. • Check that the slave unit is ready. • Move the slave unit closer to this flash. • Point the sensor of the slave unit toward this flash. The power turns off by itself. • The Speedlite's auto power off has activated. Press and hold the Speedlite's power button for at least 1 second. The picture is underexposed or overexposed. • If there was a highly reflective object (glass window, etc.) in the picture, use FE lock. • If the subject looks very dark or very bright, set flash exposure compensation. 29
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29
•
Check that the slave unit is ready.
•
Move the slave unit closer to this flash.
•
Point the sensor of the slave unit toward this flash.
•
The Speedlite’s auto power off has activated. Press and hold the Speedlite’s power button
for at least 1 second.
•
If there was a highly reflective object (glass window, etc.) in the picture, use FE lock.
•
If the subject looks very dark or very bright, set flash exposure compensation.
The slave unit flash does not fire.
The power turns off by itself.
The picture is underexposed or overexposed.