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The Speedlite 420EX is ideal for all EOS users with its combination of power, features and affordability.

It's fully E-TTL compatible, and reverts to standard TTL operation when used on older EOS bodies or the T90. The fully swiveling bounce head zooms automatically over a range of 24mm-105mm.

Most impressively, its Wireless E-TTL compatibility permits it to function as a "slave" unit, triggered by a 550EX; ST-E2. Any number of 420EX and 550EX Speedlites can be combined as "slave" units.


  • Guide No. (at ISO 100/m): 42
  • Bounce: Yes
  • Zoom: Yes
  • Swivel: Yes
  • Slave: Yes
  • AF Illuminator: Yes
  • Type: Dedicated

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