Canon 420EX Speedlite TTL Shoe-Mount Flash for EOS

The Speedlite 420EX is appealing for many EOS users due to its sensible combination of power, features & affordability. It is fully E-TTL compatible, yet reverts to A-TTL for use with older EOS cameras as well as the FD-mount 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 for creative effects.