TR TTL Electronics I-TURTLE 3 SMART TTL trigger for Nikon DSLR and MILC systems - LED for Optical Bulkheads

i-TURTLE SMART 3 – TTL & Manual Trigger for Nikon DSLR and MILC systems

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

The i-TURTLE SMART 3 is our latest-generation TTL trigger designed for Nikon DSLR and 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.

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 Compatible Nikon Cameras (TTL / MANUAL mode):

Nikon MILC: Z30, Z50, Z6, Z6-2, Z7, Z7-2, Z9, Z8
Nikon DSLR: D5, D4s, D4, D850, D810, D810A, D800, D750, D600, D500, D300, D300s, D7500, D7200, D7100, D7000, D90

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 Compatible TTL Strobes (as of 06/2025):

• Ikelite DS160, DS230

• Seaflash 60D, 160D

• Inon Z240 / Z330

• Sea&Sea YS-D2J, YS-D3, YS-D3 DUO

• Retra PRO X MILC
  Retra PRO MAX DSLR/MILC

• AOI Intelli Strobe (SONY settings)

• Backscatter HF-1(SONY settings)

• APOLLO III V2.0, APOLLO S

HSS (High-Speed Sync)  available from camera menu

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

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 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 mode switching via the camera menu – even underwater

  • First curtain

  • Second curtain

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Package Includes:

• 1× i-TURTLE SMART 3 TTL Trigger for Nikon 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.

Manual Download

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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=UVkscXZP0QU