技术细节
| 特定品牌闪光灯系统 |
E-TTL II (Canon), E-TTL I (Canon) |
| 自动对焦(AF)的协助光束 |
Y |
| 大约回收时间 |
5.5 s |
| 闪光指数（ISO100，设定35mm焦距） |
9 m |
E-TTL II/E-TTL Guide No 9 (24mm), 2 x AAA, 50g
<b>Slim, pocketable design – ideal for the EOS M</b>
The compact flash of choice for the EOS M users, the Canon Speedlite 90EX weighs just 50g (without batteries) and its space-saving design means it will fit into even the smallest of kit bags.
<b>Shoot superbly lit portraits and indoor scenes</b>
Ideal for shooting with ultra wide-angle lenses, the Speedlite 90EX delivers exactly the right illumination for great portraits as well as superb indoor and group shots.
<b>High power in a compact body</b>
Despite its diminutive size, the Speedlite 90EX has plenty of power and with a maximum guide number of 9 (m, ISO100) it’s ideal for illuminating dark and night time scenes such as a party or an evening barbeque. It’s also perfect as a fill-in flash for subjects shot outdoors with the sun behind you.
<b>Explore creative lighting effects</b>
The Speedlite 90EX opens up countless creative lighting opportunities, thanks to its built-in Wireless master function. As a master flash unit it can wirelessly trigger up to three groups of other flashes, which have a built-in slave function such as the Speedlite 270EX II, from up to 7 meters away indoors.
<b>Quick, discreet and fully automatic flash shooting</b>
When you want to take continuous shots quickly and discreetly the Speedlite 90EX is always ready for action. Power recycling is silent and fast - it takes only 5.5 seconds before its ready for the next shot. It’s also compatible with the autoflash metering systems found in the EOS M and other EOS DSLR cameras, ensuring fully automatic accurate flash exposure in all situations.
<b>Powered by readily available AAA batteries</b>
To keep the size and weight of the working flash unit down to a minimum and for maximum convenience the Speedlite 90EX is powered by two readily available AAA/LR03 batteries (either Ni-MH or lithium).
