Canon Speedlite 90EX Instruction Manual - Page 30
Troubleshooting Guide - flash for eos m
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Troubleshooting Guide If a problem occurs, refer to this Troubleshooting Guide. The Speedlite does not fire. • Make sure the batteries are installed in the correct orientation. (p.5) • If the lamp does not light after 30 seconds, replace the batteries with new ones. (p.5) • Clean the electrical contacts of the Speedlite and the camera. The bottom of the picture looks dark. • You were too close to the subject. Keep at least 1 m/3.3 ft. away from the subject. • If a lens hood is attached, remove the lens hood. • When using Mount Adapter EF-EOS M, the light from the flash may be obstructed, making the bottom of the picture dark. The picture is really blurred. • When the shooting mode is set to mode for a dark scene, a slow sync speed is automatically set, and the shutter speed also becomes slower. Use a tripod or set the shooting mode to . 28