Pavel Kolpakov

I can comment. The real story is as follows: A German dealer company ordered a customized trigger for their client. We manufactured it, tested it, and shipped it. I tested it personally before shipping. It was really a nice product. The German client spent a long time testing it himself. His old style Nikonos sync cords (for fixed pins) didn't fit well the Isotta original bulkheads (with spring pins) factory pre-installed on the housing, unreliable electrical connection with the strobes was detected that caused unstable TTL lighting, also were problems with his very old Subtronic strobes, and other problems. I helped him online every day for a week, as best I could. Forum members know that i sincerely help people. He did not agree to change the old style sync cords, or change Isotta bulkheads. So, there was not a normal compatibility. Ultimately, he said he didn't like that all and wanted to return the product to his dealer for a refund. And Ok, we approved this solution, because a normal TTL could not be reached with such bad cable connections. Independently of reasons, if client is not satisfied with the system in the housing, he can be refunded then. This is normal, no problem. We refunded to his dealer, the same day. As i know, the dealer also solved the technical problem with the client, he planned to install isotta manual trigger in that housing. Manual trigger uses only X-sync contact and Ground in the bulkhead to fire the flash. And it was acceptable for such sync cord connection. Some time after refund, however, this man became active again and started send me a lot of messages in inadequate manera by Facebook messenger. And after some time I just blocked him in Facebook for such style communication. That's the end of that story. Significantly later, that client started this post here on Waterpixels. As i understood, our factory refunded to the dealer, but that client did not return the product.

The item appears to be damaged. This may have occurred during shipping or for another reason. You will need to have the item replaced by your dealer.

UWTechnics TTL Converters for Sony and for Nikon were successfully tested with the newest Sea&Sea YS-D130R strobe. The TTL, HSS and M modes are supported. By the way, the circular tube brought a nice TTL for Sea&Sea strobe. YS-D130R strobe compatibility is officially confirmed now and will be included in the User Manuals of TTL Converters for Sony and Nikon. Canon and Olympus versions are in the work now.

Sony's camera menu doesn't have a built-in option for switching external flash to M mode. Therefore, a separate command, which isn't used underwater, was assigned (by TTL Converter firmware) to switch the flash system to M mode without pre-flashes. UWTechnics TTL converters were the first to use the WL command to switch the flash to M mode. Company developed the controlled M mode, allowing the user to manually adjust the flash power via the Sony camera's menu dial. The same time, the traditional manual flash adjustment via the strobe knob is also available. Here is the UWTechnics User Manual text:

External TTL Converter 18023-M24 for Sony, installed on the MARELUX housing. (Photo by Phil Rudin)

UWTechnics External TTL Converter for Sony installation in M24 hole on Sea&Sea MDX-aU housings:

To use LED triggers in TTL/HSS modes, you should use new type 613 fiber optic cables. Other cable models may have a significantly lower transmission index. The type 613 cable is also mentioned in the trigger User Manual. You have to configure the trigger and camera according to the User Manual, step by step.

UWTechnics supplies a small 2x0.5mm flat-head screwdriver with every product. Here is the photo: This is a very popular flat tip size. It can be purchased at most hardware and auto parts stores. Please note that the rotary switch shaft is made of soft plastic (easily damaged with the wrong tool). It's best to use a standard small 2x0.5mm or similar size screwdriver.

Hi Brad, As i understand it, this is a second-hand TTL Converter for A7 camera, purchased together with a housing recently. You don't know the year of issue, so the circuit version is not clear enough. According to the photo, it looks like product of 2014 year. So, initial owner probably started to use it 12 years ago. But nobody knows if it works or broken now. I can help you with some information and User Manual. That circuit had a little bit different schematics than modern versions, and It did not have a separate profile for Z330 yet. Switch position "6" was reserved (empty) there. But you can use any existing similar profile, for example Z240 (switch position - 1). It is not the same, but will work. You also can try another profiles, according to the User Manual that i sent you by email.

A few more photos:

The installation and functionality of UWTechnics External M24 TTL Converters on the new Seafrogs aluminum housings has been successfully tested. UWTechnics TTL converters with M24 thread (Sony, Nikon, Canon, Olympus) fit perfectly into the M24 hole on the top of those Seafrogs aluminum housings, without interfering with external controls. The metal bracket also eliminates interference. The connection to the camera (inside the housing) is also comfortable. The installation on aluminum Seafrogs housings is very simple and secure, the same well as TTL Converter M24 installation on Nauticam and Marelux housings. So, now the TTL and HSS flash control is available for this housings line, supporting the most popular strobes on the market: Sea&Sea, Inon, Retra, Marelux, etc. This information may be useful for Seafrogs users.

This is a new product, still in development. Technical delays are possible. However, it will be available soon.

Backscatter strobes have proprietary TTL protocol, not a classic TTL. Proprietary TTL protocol requires Backscatter triggers usage, as i remember those triggers exist for Olympus and Sony. The HSS system in Backscatter strobes is compatible with most of HSS triggers on the market, including UWT triggers of course.

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Silver/Black color design version: