About uTrigger

How does it work?

Inside the housing there is a connector (1) connected to the camera and the sensor (2) via cable. The housing wall (3) can be up to 20mm thick and made of various materials (aluminium, inox, plastic etc.). The transmitter (4) and the sensor (2) have to be positioned on the same axis. The signal between the transmitter (4) and the sensor (2) travels wirelessly through the housing wall (3).

Bulb and lock

The uTrigger is equipped with bulb and lock functions which allow the photographer to make long exposures.
When not in use the uTrigger can be locked to avoid accidental triggers and using the battery.












The uTrigger can be connected at any time during the dive thanks to it's short range wireless technology. When not connected the uTrigger can be mounted to your BCD via the mounting rope.

  • it is universal which means you don't need to buy a new device when you change your camera or housing
  • it can operate for more than 4000 triggers and up to 3000 seconds of bulb time on a single battery
  • it features a bulb and lock option for long exposures and to avoid accidental triggers
  • it works in manual and autofocus mode 


Technical specification

aluminim anodized housing

weight: 500 g

body lenght: 185 mm

depth rating: -80m

cable lenght: 15 ft (4 m)

integrated bulb/lock function

operating voltage: 2 x 9 V battery



Canon: 5D, 5Dm2, 5Dm3, 5D30, D50, 1D, 1DS, 1D, MARK II, 1DSm2, 1DSm3, 10D, 20D, 30D, 40D, 50D
Nikon: D1, D2X, D3, D3x, D4, D4s, D90, D200, D300, D300s, D600, D610, D700, D800, D810, D3100, D5000, D5100, D7000, D7100, D7200, N90S, F5, F6, F100, F90, F90X
If your camera is not on the list write to us at develop@retra-uwt.com for the posibility of making an adapter.





What is it used for?

  • Long exposures











  • Shy animals











  • Polecam











  • Selfies











How do I focus?

The uTrigger uses a one stage triggering method which works with manual and autofocus settings.

  • with the camera in autofocus mode and the focus priority turned on, the camera will start to focus when the button is pressed
  • once the camera is in focus it will be triggered automatically
  • with the camera in manual focus mode it is triggered when the button is pressed

Will it fit my housing?

The uTrigger requires two small surfaces on the inside and the outside of the housing where you can mount the sensor bucket and the transmitter button. Both surfaces measure less than 15mm in diameter. For additional mounting tips, click here.

  • Mounting bucket on the inside of the housing (for sensor):


  • Mounting button on the outside of the housing (for transmitter):


  • Slim connectors  for connecting to cameras:

Canon E3 ->

Canon N3 ->

Nikon USB ->

Nikon 10pin->


Battery status

The uTrigger plus is supplied with a three stage voltage meter to test the batteries.
Connecting the dots on the transmitter and the uTrigger housing will show the status of the battery.



Package contents


             uTrigger plus

             Slim connector

             Three-stage voltage meter

             4 x rubber bands

             Additional bolt

             Additional stickers

             2 x O-ring seal

             Additional mounting buttons










Watch the videos: