Why doesn't my Canon Speedlite 420EX Camera Flash fire?
The Canon Camera Flash might not fire due to several reasons: * The batteries may be exhausted, so install new batteries. * The batteries may be installed incorrectly; ensure they are in the proper orientation. * The mounting foot might not be securely mounted; slide it all the way into the hot shoe. * The hot shoe contacts may be dirty; clean the contacts.
What to do if Canon Speedlite 420EX slave unit does not fire?
If the Canon Camera Flash slave unit isn't firing, consider these potential causes: * The wireless selector might be set incorrectly; set the wireless selector to < >. * The unit may be out of range; position the slave unit within the master unit's wireless transmission range. * The wireless sensor might not be facing the master unit; point the slave unit's wireless sensor toward the master unit. * The master unit's flash mode may be incompatible; set the master unit's flash mode to < >.
Why does my Canon Speedlite 420EX power turn off automatically?
If your Canon Camera Flash turns off automatically, it is likely because it has not been used for 90 seconds. To resolve this, press the shutter button halfway or press the test firing button.
What to do if my Canon Speedlite 420EX cannot be detached?
If the Canon Camera Flash cannot be detached from the camera, the locking collar has probably not been loosened enough. Loosen the locking collar until the locking pin disengages.
General| Number of batteries supported | 4 |
|---|
Weight and Dimensions| Weight | 300 g |
|---|---|
| Dimensions (WxDxH) | 71 x 99 x 122 mm |
Describes how to insert batteries into the Speedlite.
Explains how to attach the Speedlite to a camera's hot shoe.
Details the settings for the wireless selector switch.
Explains the ON/OFF settings of the main power switch.
Describes the settings for normal and high-speed sync modes.
How to check flash readiness and perform a test flash.
Explains the flash exposure confirmation lamp and its meaning.
Explains how flash coverage adjusts to focal length.
Details the function and range of the AF-assist beam.
How to use flash in Full Auto or Program AE modes.
Using flash in Aperture-priority, Shutter speed-priority, and Manual modes.
How to use high-speed sync for faster shutter speeds.
How to lock flash exposure for precise lighting.
Capturing light trails with rear-curtain sync.
Firing a test flash to preview lighting effects.
Using flash in Full Auto or Program AE modes for Type-B cameras.
Using flash in Av, Tv, and M modes for Type-B cameras.
How to bounce flash off surfaces for softer lighting.
Applying flash exposure compensation for adjusted flash output.
Creating sophisticated lighting with multiple Speedlites.
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