Something like this would do the trick - and there are both cheaper and more expensive variants. You need line of sight of course and these can be triggered by other ...

Bringing a new level of versatility and capability to flash photography, the Speedlite 430EX II features a powerful flash with a fast recycling time in a compact, durable body. A one-touch quick-lock ...

I've been thinking about getting an external flash for my PowerShot S5 IS, the 430EX II seems to be all I'd need for the moment, but I'll be damned if I can actually find anywhere that says exactly if ...

I never thought Canon got quite enough credit for building full radio triggering functionality into their Speedlight 600 EX-RT flashes, but apparently it has been working for them because now they’re ...