Photography is fun and effortless when you have the Canon Speedlite 420EZ shoe mount flash. E-TTL compatible, this Canon shoe mount flash transforms to regular TTL operation when you use it on older EAS devices. The swiveling bounce head of this Canon flash automatically zooms within a range of 24 mm - 105 mm, making it easier to capture distant objects. This Canon shoe mount flash can also be utilized as a slave unit due to its wireless E-TTL compatibility. FE Lock function of this Canon flash acts as a spot meter making it easy to capture off-center subjects or highlights that may at times deceive the meter. You may use the Canon Speedlite 420EZ with all "Type B" EOS cameras and the T90 SLR body.