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Ikelite Releases TT5 Canon TTL Fiber Optic Transmitter and RC2 TTL Receiver for DS Strobes
By Ian Bongso-Seldrup, March 22, 2024 @ 10:00 AM (EST)

Ikelite’s DS-series strobes have electrical bulkheads and are designed to be wired to housings similarly fitted with an electrical bulkhead. To enjoy class-leading automatic strobe exposure, all you have to do is add the appropriate TTL converter between housing and strobe(s), and you can switch between manual and TTL modes on the fly. (You don’t even need a battery for the converter because it’s powered by the strobe.) But what if your preference is for a fiber-optic connection between housing and strobe(s)? Now Ikelite has released two new products to make that possible for Canon shooters: the TT5 Canon TTL Fiber Optic Transmitter and the RC2 TTL Receiver.

The TT5 Canon TTL Fiber Optic Transmitter replaces your electrical bulkhead or 1/2-20 accessory port plug in your Ikelite housing (50DL, 200DL or 200DLM) and allows you to use the camera’s flash menu to switch between TTL and manual strobe exposure. As well as supporting rear curtain sync, the device also supports high frame rate burst shooting when used with DS160-series or DS230-series strobes. The transmitter is powered by two CR2032 lithium batteries. The RC2 TTL Receiver simply attaches to your compatible DS strobe(s), converting the electrical bulkhead to a fiber-optic connection.

Available to order from Ikelite, the TT5 Canon TTL Fiber Optic Transmitter retails for $325, while the RC2 TTL Receiver costs $150. Note: Ikelite says that the transmitter is not designed for use with other manufacturers’ housings. See more product information below.

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TT5 Canon TTL Fiber Optic Transmitter for DL and DLM Underwater Housings

Ikelite TTL exposure algorithms for underwater strobes has been famous for accuracy since the dawn of digital. Now you can enjoy the most reliable Canon TTL strobe exposure with a fiber optic connection between your Ikelite housing and DS strobes.

Replace your Ikelite flash bulkhead or 1/2-20 accessory port plug with this compact, independently sealed device, for reliable fiber optic triggering of an Ikelite DS Strobe (requires RC2 TTL Receiver). High frame rate burst shooting is supported when used with an Ikelite DS160-series or DS230-series strobe.

The TT5 supports rear curtain sync and switching between TTL and manual strobe exposure using the camera's flash menu.

The transmitter is powered by two CR2032 lithium single-use or rechargeable batteries (not included). The Transmitter has a built-in power save mode which prolongs battery life. Expect at least a week of diving out with average use. It is always recommended to travel with a spare set of batteries.

Housing Compatibility

  • All Ikelite 200DL Underwater Housings for Canon cameras
  • All Ikelite 50DL Underwater Housings for Canon cameras
  • Ikelite 200DLM Underwater Housings with an electrical bulkhead or 1/2-20 threaded accessory port EXCEPT for Canon 250D Rebel SL3 # 6970.08
  • Not designed for use with other manufacturers’ housings


Fiber Optic Cord Compatibility

  • (recommended) Ikelite Fiber Optic Coiled Cord # 4501
  • INON Optical D Cable "Non-wireless type" L-Connector
  • SEA&SEA Fiber Optic Cable (L-type) # 50107
  • SEA&SEA Fiber Optic Cable II # 50128
  • Olympus UW Fiber Optic Cable PTCB-E02
  • Nauticam Optical Fiber Cable # 26211 Nauticam to INON
  • Nauticam Optical Fiber Cable # 26212 Nauticam to Sea&Sea


Strobe Compatibility

Each strobe must have an RC2 TTL Receiver # 4412 attached. The RC2 and TT5 are only compatible with the following Ikelite DS strobes:

  • Ikelite DS50 above serial # 70000
  • Ikelite D51
  • Ikelite DS125 above serial # 5000
  • Ikelite DS160, DS161, DS162
  • Ikelite DS200 above serial # 7163
  • Ikelite DS230, DS232

This product is not compatible with non-digital Ikelite strobes, SEA&SEA, INON, or other non-Ikelite strobes.

In the Box

  • TT5 Canon TTL Transmitter*
  • TTL Hotshoe
  • Battery holder

* requires 2 x CR2032 batteries not included

Product # 44701
$ 325.00

RC2 TTL Receiver # 4412



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