UW Technics ships TTL circuit for Sony mirrorless cameras in Sea&Sea housings

UW Technics has announced that their TTL converter for Sony a7 cameras in Sea&Sea housings is now shipping. It offers manual and TTL support for most Inon, Ikelite, Sea&Sea, and Subtronic strobes via either fiber optic or electrical connection. The TTL board can be installed by the user.

The new TTL converter is shipping now, priced at $450.

UW Technics ships TTL converter for Sony A7 II ….A7 IV for newest Sea&Sea underwater housings

This product line from UW Technics company includes SONY compatible TTL circuitry. The new product is an internal TTL Converter for Sea&Sea underwater housings, purposed for mirrorless full frame SONY cameras.

UW Technics #11049 TTL Converter is compatible with Sea&Sea MDX-A7II, MDX-A7III, and MDXL-A7IV housings. Currently, the product is available in stock.

Combined circuit

The combined circuit, consisting of Optical TTL and Electric TTL system, is on a single board with both triggering methods available both separately or simultaneously. Photographers can use fiber optical cable or Nikonos sync cord for underwater strobes, depending on preferences. Dual cables are supported, as well.

TTL Accuracy

Tests showed fantastic TTL accuracy in a wide range of camera settings. The newest firmware contains an accurate TTL profile for each strobe type: Inon Z330 / Z240 / S2000; Ikelite DS161 / DS160; Sea&Sea YS-D1 / YS-D2 / YS-250; Subtronic Pro-270 / Pro-160. Strobe type can be easily set by onboard miniature 10-position rotary switch.

Easy User Installation

Installation is very easy and takes around 1 minute. User Manual is included with the circuit.

No mechanical switch ON / OFF

UW Technics TTL Converters don’t need any On/Off external switch. Device switches On/Off automatically via camera command. This is a very comfortable feature for the user; he need not think about switching the device and need not have any mechanical switch on the housing.

Incredibly long battery life

Battery life – 2 years in continuous working mode. Products have microcurrent consumption from a pair of CR2032 batteries and automatic On/Off switch. Users need not care about the battery during the dive trip.

Hot Shoe safety parking

TTL Converter includes a special holder for Hot Shoe plug, which can be instantly installed inside the housing. This saves as protection and a comfortable park position for Sony multi-interface hot shoe plug, especially useful when housing is in transportation.

Easy control via the camera menu

TTL circuit is fully controllable via camera menu, including switching: TTL / M, 1-st/2-nd Curtain, Slow sync, +/- Flash Exposure Compensation, Manual Flash Intensity Adjustment in M mode, Flash Off, etc.

Special additional feature for M mode:

Manual Flash intensity 1/64 …1/1 adjustment, using camera wheel and scale

TTL circuit firmware has a special module, which allows the photographer to use three variants of M mode, including both classic and advanced methods. Advanced control allows adjustment of underwater strobe light intensity manually via camera scale (approximately 1/64 ….. 1/1). In this case, photographers do not need to operate dial switches on the strobe body; they can keep hands on the housing, switch into M mode, and set the flash intensity by camera controls.

Specifications of TTL Converter:


UW Technics can be contacted via email or via their Facebook Page. Full specifications and detail of all their products are available on the UW Technics website.