Speelights on a stand and triggering with mark ii

How do I remotely trigger a speedlight that is not connected to the camera? And how do I trigger more than one speedlight? I know how to attach a speedlight to the camera and get it to flash but I want to place more than one in different parts of a room and get them to trigger from either the camera or from an ipad. Thank you

Canon and some third-parties have wireless flash systems that work over radio frequencies.

Here's some information on Canon's system: http://cpn.canon-europe.com/content/education/infobank/flash/wireless_flash.do

Although IR wireless is cheaper I don't recommend it since a line of sight is necessary and it doesn't work that well in daylight.

If Canon's system is too expensive (it was for me) Yongnuo makes a third-party alternative. I use this combo and it works very well. I have 4 of the flashes, 1 trigger, and I have a spare receiver that I hoped to use with my 580ex before it died.

brionix said:

How do I remotely trigger a speedlight that is not connected to the camera? And how do I trigger more than one speedlight? I know how to attach a speedlight to the camera and get it to flash but I want to place more than one in different parts of a room and get them to trigger from either the camera or from an ipad. Thank you

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Depends. Do you already have the speedlite(s) and looking for a way to control them, or are you looking to acquire an entire system? Are you planning to set the flash output manually, use self-controlled auto-thyrister type speedlights, or want the exposure controlled with Canon's ETTL system?

I agree with rmexpress22: Avoid optical (IR) triggers. There are more ways for those links to fail than for them to succeed. Radios are far more reliable in the face of line-of-sight blockages, poorly aligned IR receivers, and ambient light.

I admit that the cost of Canon links had me reaching for the large bottle of heart start, but the aftermarket radios have proven to provide good value. I'm using a Yongnuo YN622C-TX on-camera transmitter and a pair (soon to be a trio) of YN622C-II transceivers. So far they've been great.

The bottom side of the transceivers mount to cold-shoe adapters atop stands, which can optionally hold an umbrella, softbox, or other light modifier. A hot-shoe on the 622C-II's top surface accepts the base of your speedlite. The whole setup supports ETTL or manual-mode control, HSS, 2nd curtain sync, and multiple firing groups, which was all that comprised my personal shopping list.