For those looking for a remote flash trigger for studio of outdoor work, you can do a lot worse than the G430C ( C is for Canon) 2.4GHz Wireless Grouping Flash Trigger.
I invested in the duo set from tomtop through ebay, it was delivered within three days and worked perfectly with the Canon 7d and the Magnaflash M302E and the m252 flash units. I needed an additional slave unit which I also got from ebay, but that had to come from China. A problem? Not at all, it was delivered from China within 5 days.
The remote and slaves are well made and multi channel so in theory you can set up different lighting system with different flash units and leave them in place, just change channel to change the flash release to trigger different set-ups.
The duo (transmitter and Receiver) was £16.00 (UK) and the additional receiver was £10.56 (UK)
G430C 2.4GHz Wireless Grouping Flash Trigger 7 Channels with TTL Pass-through
Compatible cameras and flashes:
Camera: for Canon, Nikon, Pentax, Sony, Olympus, Samsung, Fujifilm, etc.;
Flashgun: for Canon, Olympus, etc.
Radio frequency: 2.4GHz
Signal type: Frequency Shift Keying (FSK)
Antenna: Built-in PCB Antenna
Control distance: 150m (subject to environmental limitations)
Flash groups: 3 groups; 7 different group combinations
Normal triggering sync-speed: 1/320 second(Subject to different cameras and flashes)
Transmitter or Receiver powered by: 2 * AAA batteries(2.4V~3.2V) (not included)
Standby time: G430-TX 100 days, G430-RX 200 hours
Camera shutter port: Diameter 2.5mm
Studio flash (RX)/ECP (TX) ports: Diameter 2.5mm
Safe port voltage: 3.3V to camera (G430-TX), 300V from flash (G430-RX)
Minimum latency: 400μs
Working temperature: -15 ~ 65 degree Celsius
Storage temperature: -30 ~ 85 degree Celsius
Transmitter size: 8.4 * 4.2 * 3.8cm / 3.3 * 1.6 * 1.5in
Receiver size: 8.4 * 4.2 * 3.8cm / 3.3 * 1.6 * 1.5in
Transmitter weight: 49g / 1.7oz
Receiver weight: 47g / 1.65oz
Package size: 21.5 * 12 * 5cm / 8.5 * 4.7 * 2.0in
Package weight: Approx. 203g / 7.2oz (includes the remote cable’s weight)