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Pavel Kolpakov

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Everything posted by Pavel Kolpakov

  1. Actually, some Nikon cameras allow "Rear curtain sync" option, only if recognize TTL protocol (flash, or TTL-Converter). But i am not sure regarding D500.
  2. Hi Elmer, Here is a picture of installed TTL board for Nexus Nikon (product #11063 UWTechnics):
  3. The best transmission index have 613-core fiber optical cables: Nauticam #26216, #26217, or HowShot 613L.
  4. Hello Dan, UW Technics produces Optical and Nikonos bulkheads for Ikelite housings (for usage with UWTechnics TTL-Converters). Optical Bulkhead is here: Your housing has 2 holes on the top. So, you can install 1 or 2 optical bulkheads, dependently on preferences. TTL-Converter supports maximum: 2 optical + 2 electric bulkheads, simultaneously. On this housing you even can use 1 optical + 1 electric bulkhead, both in TTL, if you want to use different strobes. TTL-Converter board shape for this housing model is in development yet, but will be announced soon. Firmware as usual includes ttl-profiles for Inon, Sea&Sea, Ikelite and Subtronic strobes. Retra ttl-profile will be included too, when new strobe appears on the market.
  5. This TTL-Converter is purposed for installation instead of Seafrogs leak detector in the housing. That is why, it includes also a Leak Detector onboard, in addition to TTL electronics. By the way, the Leal Detector is better than original. You can connect Optical bulkhead or Electric bulkhead to TTL-Converter, dependently of your preferences. TTL works the same in both variants. In case of Optical bulkhead, you can use HowShot 613L or Nauticam #26216 fiber optical cable. Those are new 613-core cables with the best transmission index now. Dual FO cables are supported as well. In case of Electric bulkhead, you can use Sea&Sea (Nikonos) or Ikelite sync cord. Dual sync cords are supported as well. Original Seafrogs electric bulkhead (factory preinstalled) does not have enough pins, it cannot be used in TTL system. Regarding TRT products, please ask manufacturer directly. Sorry, I don't have enough technical information.
  6. UWTechnics currently produces Optical Bulkhead and Electric (Ikelite, Nikonos) bulkheadfs for Seafrogs housings. Those bulkheads have special shape mount side, the same as Seafrogs / Meikon original. TTL circuit for Sony A7-A9 Seafrog housings:
  7. Z240 performs just a mono flash, it cannot produce FP flicker 40 khz. Camera shutter window must be fully open at the moment of mono flash, to get uniform exposure along the shot. Nikon mechanical shutter fully opens window maximum at 1/250, not faster. That is why 1/250 is official "sync speed". If user sets 1/320 ... etc., the window never fully opens, it looks like an open strip going along the shot (rear curtain becomes visible on the picture), and it needs FP flicker long flash then. So, shooting by Nikon with underwater strobes, user must set only up to 1/250 speeds, to get uniformly lighted picture. Yes, 1/320 is threshold value, dark strip is slightly visible (or almost invisible) on some Nikons, but anyway, it is not recommended for common case.
  8. This is truth, Inon FEC algorithm via Z240 / Z330 right dial switch is effective not for all cases. Synching by pop-up flash, the effect sometimes is small or invisible. But, if you use any Optoelectronic TTL-Converter for Z240 / Z330 synchronization, you see that Inon FEC (right dial switch) really adjusts +/- lighting. This is because of LED's clear square signal shape, Inon FEC algorithm process it much better than analog flash signal.
  9. Yes, Retra new strobe is announced as HSS. We are waiting for it to make TTL tests. When HSS strobes appear on the market, TTL circuitry manufacturers can make HSS feature in firmware.
  10. Thank you for kind words guys! I am happy to help when i can.
  11. Good job! And good idea! Please advice, where did you buy that transparent spare part? I also need it. By the way, UW Technics is developing now TTL converter for Seafrog A6xxx housings. It's LED board is purposed for installation on this transparent part (inside the housing). TTL converter has LED and Electric outputs, as usual. So, you could more easy use both type connectors (Optical/Electric) on your A7RIII housing, using that transparent part you has installed and Nikonos bulkhead simultaneously.
  12. The concrete strobe YS-D2 sample may be a problem, who knows. Try to change the strobe, just for test. Let's contact in Messenger, I think i know how to solve your setup problem anyway.
  13. Hello Joss, Only Sony plays that game with sync speed (1/160 >> 1/250). Nikon D500 has fixed max sync speed 1/250. This is simply a speed of Nikon mechanical shutter. Impossible to improve it by this way, The only way to use high shutter speeds for D500 is to use HSS underwater strobes (if appear on the market), which can produce 40 khz flicker long flash.
  14. Nauticam product is manual trigger, it does not use communication protocol with camera. Max sync speed must be 1/160 for this case. Yes, the 1/200 can be used as a threshold value, small gradient begins at the top of image. But for 1/250 sync speed, you need any TTL device connected to HotShoe.
  15. UWTechnics ships Sony TTL Converter for Nauticam A7...A9 housings since 31-July. Maximum sync speed is 1/250, tested, no dark strip on images.
  16. Subal must supply VR3 board only with "left" type HotShoe cable (cable is pointed left). But looking to user setup picture, i saw the "right" type cable there. User has to reconnect cable now to mirror position (rotate 180 degrees) on the board. It will not be so comfortable as proper cable ("left type"), but it will work. Here is assembling for such case:
  17. If you cannot sync the devices, it exactly means that something is wrong in setup or settings. Any small detail or defect, which you maybe don't see. Ok, i will make detailed video after few days. It will help you. Sorry i am out of city till the end of the week, so i can make the video only next week. If you have possibility, try to change the concrete parts of the system, - strobe (first of all), FO cable, camera, to recognize the problem part. This TTL board can work with all Nikon cameras and most of underwater strobes. Don't worry, you will solve the problem, anyway. Many people use #26308 with Z7/Z6 for today, and everything works fine.
  18. I also love this TTL-Converter for Olympus cameras. New generation TTL product, everything is optimized there. Can you show some underwater images with that TTL, after your dive trip?
  19. Tim, you are actually right. This is not a rare case. I also know 2 people in my country, who got Subal housing with mixed Hotshoe type (Canon / Nikon). User did not know about it for 2 years, because shot in manual only. X-Sync pin is on the same position on both. People discovered wrong HotShoe only when began to setup TTL system. So, first of all, i would check the HotShoe pins, to be sure it is Nikon type. The second turn, - try to reconnect HotShoe cable to mirrored position on the board socket. Subal produces "left" and "right" HotShoe cables, sometimes mixed for TTL board.
  20. Ok, Some more advices: 1) YS-D2 has 2 different TTL modes, switching between them is by pressing the button for 2 seconds. Users often mix up those 2 modes. Check details by YS-D2 User manual. Switch the mode of the strobe to another type TTL. 2) Set camera menu to 1/200 without FP. The #26308 board is in TTL mode then. "Green" indicator confirms TTL mode on the 26308 board. By the way, if you set it with "Auto FP", this command switches system to M mode. Pay attention, this command is assigned in firmware for switching TTL/M. "Blue" indicator confirms M mode on the 26308 board. This is described in User's Manual. 3) We don't know your 26308 firmware update, maybe you need -0.5 ev compensation set by menu, maybe not (if firmware is updated). Try both variants then. This is easy. 4) Rotary switch set to "3". This is position for YS-D2 ttl-profile. Rotate it around, set to "3" again, to be sure that rotor is clicked in exact position. This is just for check, but anyway. 5) Sometimes (rather rare), the LEDs installation by user is not accurate in the housing, it is important. Align the LEDs inside the optical bulkhead according the centre line of optical core. Push them forward by any tool, maximum deep inside, closer to transparent element inside the bulkhead. P.S. Hope finally you can find the reason in concrete setup. If not, i can help, shoot a video on days, - #26308 TTL board with Z7 and YS-D2, step by step setup and work.
  21. Hi Tom, Something is assembled wrong, or wrong parts. I can help regarding Subal TTL system, check your system step by step, better in messenger.
  22. Automatic identification of Z7/Z6 cameras appeared in TTL board #26308 only last months, was firmware update. If your TTL board was made some time before it, it means you have to set -0.5 ev (or -0.7 ev) "Flash Exposure Compensation" in camera menu by hands. This is easy. This note was in User's Manual when Z cameras had appeared on the market. Last time i tested Z7 camera with #26308 TTL board in the room a month ago, it worked normally. Also, pay attention, you have to use only new type (613-core) fiber optical cables Nauticam #26216, or #26217. This is important for YS-D2 control. Carefully read User's Manual of TTL-Converter and check if you set TTL mode (by menu command), or maybe you set M mode. TTL mode confirmation is GREEN light of onboard LED. YS-D2 by itself has rather narrow TTL range via optical input. Using this strobe, better set apertures F6.3...F22 underwater (ISO 200), to keep the system inside the working TTL range. Strobes must be not closer 0.35m to an underwater subject.
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