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Occasional Contributor
Posts: 8
Registered: ‎01-22-2018

Canon SL1 Camera

He there.  I am new to this forum as of January 22 2018.  Does anyone know if a Canon 420 EZ Speedlight flash will fit my Canon SL 1?  Thank you in advance.  I have a chance to buy a used one for $40.00. Is this a good deal?


Posts: 8,444
Registered: ‎11-13-2012

Re: Canon SL1 Camera

It will fit, but it will only flash at full power. I wouldn't recommend it for a beginner. You want an EX version of flash.

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, MX472, LR Classic
Reputable Contributor
Posts: 988
Registered: ‎12-24-2013

Re: Canon SL1 Camera

[ Edited ]

$40 is an average price for a 430EZ. It is not a "deal". 


I used my old film era Canon 430EZ on my first DSLR (EOS 10D) until I got a 430EX.


As John said, it will fit but, it is not designed to operate on DSLR cameras.  The 430EZ is designed for A-TTL and is not compatible with E-TTL flash metering. If used in auto-flash, it will always fire at full power because it can't read the ETTL flash metering.


BUT, It does have a manual mode and can be used to fire at lower power settings.  Maual setting available are 1/32 1/16 1/8 1/4 1/2 and 1/1.


It still has some auto features that work WILL with the new Canon DSLR's.


1) It will auto zoom the flash head to match your lens focal length.

2) It will show your flash coupling distance for the power, ISO, and aperture you set,

3) Will display aperture selected on your camera

4) Will display ISO selected on your camera

5) Will display "Flash Ready" icon in viewfinder



Canon Knowledge Base:  430EZ Speedlite : How to set the Speedlite for Manual Flash mode








Mike Sowsun
80D, 5D Mk III
Occasional Contributor
Posts: 8
Registered: ‎01-22-2018

Re: Canon SL1 Camera

Thank you for your input and knowledge
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