Trasteando por la red me he encontrado estos triggers que parecen muy interesantes ,
son de la marca Ojecoco H-550 con estas caracteristicas .
l Specification TOP
Radio frequency: 2.4GHZ
Signalling: Frequency Shift Keying (FSK)
Antenna: Built-in PCB Antenna
Controlling Distance: 150m
Channels: 16
Flash groups: 3 groups, 7 different group combinations
Normal triggering sync-speed: 1/250 second
High sync-speed: Up to highest shutter speed of camera - 1/8000 second
Continuous trigger frequency: >20 frames / second
Battery type: 2x AAA (2.4V~-3.2V)
Standby time: 200 hours
Camera shutter interface: Ø 2.5mm
Studio flash interface: Ø 2.5mm
Voltage of Flash Port: 3.3V（Transmitter）, 160V（Receiver）
Minimum Time Response: 480us
Body Dimension: 78*46* 38MM
Net Weight: 55g
Working Temperature: -15℃ ~ 65℃
Storage Temperature: -30℃ ~ 85℃
pagina official Shenzhen OJECOCO Photographic Technology Co., Ltd ® - Remote flash and camera triggers for professional and advanced amateur photographers
video Test : Test Ojecoco H550 transceiver - YouTube
Test Ojecoco H550 transceiver part II - YouTube
Test Ojecoco H550 transceiver part III - YouTube
disponibles en ebay.es aqui : http://www.ebay.es/itm/2x-Ojecoco-H5...ht_3285wt_1037

un saludo a todos