i-TURTLE SMART 3 TTL Trigger for Nikon DSLR & Nikon Z Systems

Professional TTL and manual strobe trigger for Nikon DSLR and mirrorless Nikon Z cameras – ideal for demanding underwater photography.

i-TURTLE SMART 3 for Nikon – TTL, Manual & HSS in the Latest Generation

The i-TURTLE SMART 3 by TRT-Electronics is a modern TTL and manual trigger for Nikon DSLR and mirrorless Nikon Z cameras. It provides reliable strobe control via fiber optic cable or – depending on the version – via electrical sync cord.

The SMART 3 version is much more than a simple name update: it features all-new hardware, upgraded software and expanded compatibility with today’s most advanced underwater strobes. This makes the i-TURTLE SMART 3 the ideal solution for professional underwater photographers who require accurate TTL exposure, manual flash control, robust operation and broad system compatibility.

Main Advantages of the SMART 3 Version

• TTL and manual strobe control for Nikon DSLR and MILC systems
• Supports HSS / High-Speed Sync directly from the camera menu
• TTL and manual mode switching via the camera menu – even underwater
• Supports first and second curtain synchronization
• USB-C connector for charging, configuration and firmware updates
• User-replaceable battery with approx. 3× the capacity of previous SMART 1–2 models
• Reinforced switches and robust connector for LED or sync cord output
• Compact design for installation inside underwater housings
• Compatible with many current underwater strobes from Inon, Sea&Sea, Retra, Ikelite, AOI, Backscatter and other manufacturers

SMART Button – Quick Battery Status Check

The practical SMART button allows you to check the trigger battery status directly:

• 4 flashes = 100% battery
• 3 flashes = 75% battery
• 2 flashes = 50% battery
• 1 flash = 25% battery

Compatible Nikon Cameras in TTL and Manual Mode

Nikon Z / MILC Cameras

• Nikon Z30
• Nikon Z50
• Nikon Z6
• Nikon Z6 II
• Nikon Z7
• Nikon Z7 II
• Nikon Z8
• Nikon Z9

Nikon DSLR Cameras

• Nikon D5
• Nikon D4s
• Nikon D4
• Nikon D850
• Nikon D810
• Nikon D810A
• Nikon D800
• Nikon D750
• Nikon D600
• Nikon D500
• Nikon D300
• Nikon D300s
• Nikon D7500
• Nikon D7200
• Nikon D7100
• Nikon D7000
• Nikon D90

Compatible TTL Underwater Strobes

The following strobes are supported (as of 06/2025):

• Ikelite DS160
• Ikelite DS230
• Seaflash 60D
• Seaflash 160D
• Inon Z-240
• Inon Z-330
• Sea&Sea YS-D2J
• Sea&Sea YS-D3
• Sea&Sea YS-D3 DUO
• Retra PRO X MILC
• Retra PRO MAX DSLR / MILC
• AOI Intelli Strobe – with SONY settings
• AOI Q1i – with SONY settings
• Backscatter HF-1 – with SONY settings
• Backscatter Mini Flash / Atom – with SONY settings
• APOLLO III V2.0
• APOLLO S

Important: The list of supported strobes is regularly updated. Before purchasing, please check with the PC or Mac configuration software whether your preferred camera and strobe combination is fully supported.

Connection Options

Depending on the version, the i-TURTLE SMART 3 can be used for optical strobe triggering via LED panel or optionally with sync cord output. For optical transmission, we recommend high-quality multicore fiber optic cables.

At checkout, please let us know which strobe model and connection type (fiber optic or sync cord) you will use. This allows the trigger to be pre-configured for optimal performance.

Package Includes

• 1× i-TURTLE SMART 3 TTL Trigger for Nikon with battery
• 1× additional battery
• 1× LED panel or optional sync cord output
• 1× USB-C charging and configuration cable
• Access to the setup software

Software & Configuration

The i-TURTLE SMART 3 is configured easily using the setup software. Strobe profiles, connection types, firmware updates and individual settings can be adjusted conveniently.

• PC setup software – available from our website
• Mac version – coming soon to the Apple App Store

Tutorial Videos

• How to replace the battery within one minute:
  https://www.youtube.com/watch?v=x1hy1vVInBw
• How to set up the trigger in Windows:
  https://www.youtube.com/watch?v=UVkscXZP0QU

Conclusion

The i-TURTLE SMART 3 TTL Trigger for Nikon is a powerful, modern and reliable solution for professional underwater photography. With TTL, manual control, HSS, USB-C, a replaceable battery and broad strobe compatibility, it offers maximum flexibility for demanding Nikon underwater setups.

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