TRT e-TURTLE 3 SMART TTL trigger for Canon MILC systems

e-TURTLE SMART 3 – TTL & Manual Trigger for Canon Mirrorless Cameras

Reliable TTL and manual flash control via fiber optic or sync cord – now in the powerful SMART 3 version.

The e-TURTLE SMART 3 is our latest-generation TTL trigger designed for Canon mirrorless cameras. This is more than a name update – it features all-new hardware, upgraded software, and expanded compatibility with today’s most advanced underwater strobes.

It is the perfect solution for professional underwater photographers who require accurate TTL exposure, smart operation, and broad compatibility with both cameras and strobes.

TRT was the first to offer Canon TTL triggers , and with the SMART 3 series, we've raised the standard once again with even more functions and support.

TRT is the first to develop the stroboscope function, which allows multiple flashes within a single exposure. 

TRT is also the first to drive AOI and Backscatter strobes using the e-TURTLE SMART TTL trigger.

Be the first to try these new features!

Tested Canon cameras (TTL / MANUAL mode):

R3, R5, R5 mkII, R6, R6 mk2, R6mk3, M6 

 Compatible TTL Strobes (as of 12/2025):

• Inon Z and S series

• Sea&Sea YS-D3, YS-D3 DUO

• Retra PRO X, PRO MAX

• AOI Intelli Strobe  (SONY settings)  

• Backscatter HF-1 (SONY settings)

• APOLLO III V2.0,

• APOLLO S

HSS (High-Speed Sync) available with compatible strobes.

All settings (1St curtain / 2nd curtain , Manual, TTL or HSS settings stored in the trigger.  After sleep mode does not have to set it again all parameters! 

?? TRT regularly add new supported strobes – before purchasing, please download the PC or Mac configuration software to check compatibility with your system.

 Key Features – SMART 3 Version

• User-replaceable battery with 3× the capacity of previous SMART 1–2 models

• USB-C connector for charging and configuration

• Reinforced switches and robust connector for LED or sync cord output

• "SMART" button to check battery status:

  • 4 flashes = 100%

  • 3 flashes = 75%

  • 2 flashes = 50%

  • 1 flash = 25%

• TTL & Manual & HSS MANUAL mode switching via the camera menu – even underwater
  All external flash fuction is available (Custom function does not work!)

• Strobe/multiflash mode   ( You can make 1-10 pcs flashing in one expo between 1/10 and 2 sec front curtain) 
  We are the only one manufacturer who made this feature in Our products.

Package Includes:

• 1× e-TURTLE SMART 3 TTL Trigger for Canon MILC with accu

• 1× plus accumulator

• 1× LED panel (or optional sync cord output)

• 1× USB-C charging and configuration cable
   

For fiber optic use, we recommend multicore (613) cables.
At checkout, please let us know which strobe model and connection type (fiber or sync cord) you will use – so we can pre-configure the trigger for optimal performance.

Software Downloads

• PC Setup Software – available from trt website

• Mac Version – available from trt website

Tutorial videos

• How to change the accu within a minute
  https://www.youtube.com/watch?v=x1hy1vVInBw

• How to setup the trigger in windows
  https://www.youtube.com/watch?v=8gUj3aq7KV4