Canon Speedlite 90EX external flash unit : Canon introduces the Speedlite 90EX flash unit, the right choice for the Canon EOS M owners. The new Canon Speedlite 90EX weighs just 50grams without batteries and its space-saving design means it will fit into even the smallest of kit bags. Ideal for shooting with wide-angle lenses, the Canon Speedlite 90EX flash unit delivers the right illumination for great portraits as well as great indoor and group shots. Despite its diminutive size, the Canon Speedlite 90EX has plenty of power and with a maximum guide number of 9 (m, ISO 100) it’s ideal for illuminating dark and night time scenes such as a party or an evening party. The Speedlite is also perfect as a fill-in flash for subjects shot outdoors with the sun behind you.