The Speedlite 420EX is sure to appeal to EOS users everywhere 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, or MR-14EX. Any number of 420EX and 550EX Speedlites can be combined as "slave" units.
Maximum Guide Number 138 at 105mm setting; G.N. 101 at 35mm setting.
Approximately 1/2-stop less powerful than 550EX.
Full E-TTL flash operation with "Type-A" bodies.
E-TTL features include high-speed FP sync mode, and FE Lock.
Fully compatible with EOS-1v, EOS-3, Elan 7 series & D30.
Powered by four AA-size batteries.
Totally TTL-compatible with all "Type B" EOS cameras.
Print View 
Watch this Item 
Send this Auction to a Friend 
