UW Technics announces TTL converter for Sony a7C case from Nauticam


UW Technics has announced a new TTL optoelectronic converter compatible with the Nauticam NA-A7C case for the Sony a7C. The user-installable device can be operated in TTL and manual modes with various Ikelite, Inon, Retra, Sea & Sea and Subtronic strobes, and high speed synchronization (HSS) of up to 1 / 8000s is supported with the Retra strobes. TTL optical and TTL electrical triggering methods are possible separately or simultaneously.

Shipping now, the TTL converter is available from retailers such as Backscatter, priced at $ 450.

When purchasing underwater photography equipment like the product mentioned in this article, please support DPG by supporting our retail partner — Backscatter.com.


TTL converter for controlling underwater strobes for the new Nauticam NA-A7C housing

Pavel Kolpakov, the inventor of innovative TTL flash control systems for underwater photos, shared information on the latest TTL circuit released by his brand UW Technics. This product from UW Technics is a SONY compatible TTL circuit, – Internal TTL converter for Nauticam NA-A7C underwater boxes, intended for SONY full frame mirrorless A7C camera.

  • UW Technics # 11078-HSS offers TTL and manual exposure control of underwater flashes, also supports High Speed ​​Sync (HSS) up to 1 / 8000s.
  • Easy user installation in Nauticam NA-A7C underwater housings
  • The products support the most popular underwater strobes: Inon, Retra, Ikelite, Sea & Sea and Subtronic

Combined circuit

The combined circuit, consisting of an optical TTL system and an electrical TTL system, is on a single board with both triggering methods available separately or simultaneously. High Speed ​​Synchronization (HSS) of up to 1 / 8000s for “Retra” strobes is also available on board.

Photographers can use a fiber optic cable or Nikonos sync cord for underwater flashes, depending on their preference. Dual sync cords (Sea & Sea, Ikelite) are also supported.

Easy user installation

The installation is very simple and takes about 1 minute. The electronic circuit is fixed by a special metal support and 2 bolts.

The powerful LEDs of the TTL converter are inserted directly into the Nauticam optical partitions.

Installation is described in the user manual included with the circuit.

Optional electrical partitions

Optional electrical bulkheads (with 4-pin MicroMatch plug) available for Nauticam cases (Nikonos, Ikelite, and S-6 style) are compatible with UW Technics TTL circuitry. User can connect underwater flashes by sync cords including dual sync cords. It has wide possibilities to assemble its own configuration of the flash control system, can even combine electrical and optical TTL control for some underwater flashes simultaneously.

TTL flash illumination accuracy

Tests have shown very good TTL accuracy over a wide range of camera settings. Users can change aperture, shutter speed, ISO, metering type, etc., but TTL-Converter automatically supports flash lighting of appropriate intensity. The latest firmware contains an accurate TTL profile for each type of strobe: Inon Z330 / Z240 / S2000; Retra Pro, Ikelite DS161 / DS160; Mer & Sea YS-D1 / YS-D2 / YS-250; Subtronic Pro-270 / Pro-160. The strobe type can be easily adjusted by a built-in miniature 10-position rotary switch.

No mechanical on / off switch

UW Technics TTL converters do not need an external ON / OFF switch. The device turns on / off automatically via the camera control. It is a very comfortable function for the user, he does not need to think about turning on the device and does not need to have a mechanical switch on the case.

Incredibly long battery life

Battery life: 2 years in continuous operation. The products have microcurrent consumption from a pair of CR2032 batteries and an automatic on / off switch. Users do not need to worry about the battery during the dive trip.

Easy control via the camera menu

TTL circuitry is fully controllable through camera menu including switching: TTL / M, 1st / 2nd curtain sync, slow sync, flash exposure compensation +/-, manual intensity adjustment flash in M ​​mode, flash “off”, and so on.

Convenient adjustment of flash intensity via camera menu

Manual flash intensity adjustment 1/64… 1/1 is available using the camera dial and camera scale.

The firmware of the TTL circuit has a special module, which allows photographers to use 3 variants of the M mode, including the classic method and the advanced method. The advanced control allows you to manually adjust the intensity of the underwater strobe light via the camera scale (approx. 1/64… .. 1/1). In this case, the photographer does not need to operate the dial switches on the flash body, he or she can simply keep their hands on the housing, switch to M mode and adjust the flash intensity to the using camera controls.

TTL converter specifications:

  • Compatible cameras: Sony
  • Compatible underwater housings: Nauticam NA-A7C
  • Compatible strobes:
    • Inon Z-330, Z-240, S-2000;
    • Retra Pro (including HSS functionality)
    • Sea & Sea YS-250, YS-D1, Sea & Sea YS-D2 (made in China);
    • Ikelite DS-161, DS-160;
    • Subtronic Pro-270, Pro-160.
  • TTL on-board outputs: 2 optical + 1 electrical
  • (+/- Ev) “Flash exposure compensation” setting: yes
  • Switching “TTL / M” mode: yes
  • Manual adjustment of the strobe intensity (using the camera controls in “M” mode): 1/64… ..Full
  • 1st / 2nd curtain synchronization mode: yes
  • Slow sync mode: yes
  • Continuous shooting mode (serial): yes
  • Switching power “ON / OFF”: automatic
  • Battery type: CR2032 (2 pieces)
  • Battery life: 2 years
  • Compatible fiber optic cable: fiber type 613 (Nauticam # 26216 / # 26217, HowShot 613L etc.)
  • Compatible electrical sync cord type: Nikonos, Ikelite, S-6
  • Compatible dual electrical sync cord brands: Sea & Sea, Ikelite

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