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Fibre optics and TTL

Ionon ttl fibre optic in-camera flash in-camera strobe

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#41 Pavel Kolpakov

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Posted 17 April 2017 - 10:30 AM

 

Thanks Pavel

 

I've got a Subal ND800 with only the fibre optic ports - no wired ones. So there is no hot shoe connector. I suspect I'll have to buy one.....

 

I'll ask Subal and report back.

If you plan to use optical TTL synchronization, ask Subal about new plastic inserts for LEDs installation, for replacement of standard clear inserts in the housing.  I don't know,  maybe new inserts are included, or maybe Subal suggests any other way for LEDs installation now. Better specify it.

If you want to use wire TTL synchronization, - this is more easy, simply connect Nikonos bulkheads to V2 onboard sockets.


Edited by Pavel Kolpakov, 17 April 2017 - 10:54 PM.


#42 TimG

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Posted 17 April 2017 - 11:44 AM

Oh right - thanks. I'll ask about that too

Tim
(PADI IDC Staff Instructor and former Dive Manager, KBR Lembeh Straits)
Nikon D800, Nikkors 105mm and 16-35mm, Sigma 15mmFE - Subal housing

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#43 JohnnyQuest

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Posted 17 April 2017 - 12:46 PM

Check out the Turtle:

 

http://trt-electronics.com

Thanks, but I've contacted them, and I've been told they are still testing it. They still can't confirm that it works with the 5D mkiv.

 

The UWTechnics information sounds promising. Thanks Pavel.



#44 Pavel Kolpakov

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Posted 19 April 2017 - 01:30 AM

The UWTechnics information sounds promising. Thanks Pavel.

UWTechnics TTL board works with all Canons, including newest cameras 5Dm4 and 7Dm2.


Edited by Pavel Kolpakov, 19 April 2017 - 08:31 AM.


#45 brandoncole

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Posted 19 April 2017 - 06:35 AM

Pavel-

On the Reef Photo web site I see that your UW Technics NN-2/IS works with Nikon cameras. Please advise which product works with Canon cameras, and where can one buy it? Where can one read more about it?

Thank you,

Brandon



#46 Pavel Kolpakov

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Posted 19 April 2017 - 07:18 AM

Please advise which product works with Canon cameras, and where can one buy it? Where can one read more about it?

Hello Brandon,

For today that product is not announced yet. Press release will be soon. 


Edited by Pavel Kolpakov, 19 April 2017 - 08:32 AM.


#47 buddy

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Posted 21 April 2017 - 12:42 AM

Yes, i tested that V2 board (white color PCB).  It has very nice TTL accuracy. And the 100% power of underwater strobe is available for TTL control by that board, another words it has full-size TTL (!).

Certainly, full-size TTL is available only for fully controllable strobes.

 

Tested strobes: YS-250, DS-161, YS-D1, YS-D2, Z-240. The board has a switch for those strobe types.

There are 2 pcs Optical TTL outputs and 2 pcs Wire TTL outputs onboard. Also, there is 1pc wire TTL connector for Nikon land strobe, because Subal also produces housings for SB-910/ SB-900.

 

New V2 board supports +/- TTL Flash Exposure Compensation (by camera wheel), TTL/M modes switching underwater,  Manual flash power setting by camera wheel (in M mode). These features already became a good tradition for modern TTL products. The same features exist in Nauticam #26308 board, UWTechnics #11031 board and External #13038 converter, Aquatica TTL board, Hugyfot TTL board. 

 

Does anybody know if this Subal V2 also work with the latest Subtronic flash (Pro160 / Pro160 Fusion)?

Asked Subal directly some time ago, they wanted to test this but never got an answer on it though...

Thanks


Juerg
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Nikon D4s, Nikon 16-35 /f4 VR II, 70-180,105mm f/2.8, Subal ND4 housing and ports, 2 Subtronic Fusion (flash and video lights), Sigma 15mm /f2.8, Subal 4" Minidome


#48 Pavel Kolpakov

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Posted 21 April 2017 - 03:27 AM

 

Does anybody know if this Subal V2 also work with the latest Subtronic flash (Pro160 / Pro160 Fusion)?

Asked Subal directly some time ago, they wanted to test this but never got an answer on it though...

Thanks

Officially, Subtronics are not in list of compatible strobes yet, only planned for future. For those strobes must be build separate TTL curves in TTL Converter firmware.

At last Dusseldorf Boat Show, using a case, I tried V2 board with Subtronic 160 /270 strobes (by wires), just for interest, - yes TTL worked, but it required some corrections. 


Edited by Pavel Kolpakov, 21 April 2017 - 03:57 AM.


#49 buddy

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Posted 21 April 2017 - 05:07 AM

Officially, Subtronics are not in list of compatible strobes yet, only planned for future. For those strobes must be build separate TTL curves in TTL Converter firmware.

At last Dusseldorf Boat Show, using a case, I tried V2 board with Subtronic 160 /270 strobes (by wires), just for interest, - yes TTL worked, but it required some corrections. 

Hi Pavel, thanks for the headup!

Some corrections, can you elaborate a bit?

Another question: I read (I guess it was from you) that with this it is also possible to change underwater from TTL to manual and then even change the power of the strobes by turning the aperture/shutter wheel on the camera? Is this really true and can you elaborate on this as well?

Will be deeply appreciated...

Juerg


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Nikon D4s, Nikon 16-35 /f4 VR II, 70-180,105mm f/2.8, Subal ND4 housing and ports, 2 Subtronic Fusion (flash and video lights), Sigma 15mm /f2.8, Subal 4" Minidome


#50 Pavel Kolpakov

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Posted 21 April 2017 - 06:29 AM

Hi Pavel, thanks for the headup!

Some corrections, can you elaborate a bit?

Another question: I read (I guess it was from you) that with this it is also possible to change underwater from TTL to manual and then even change the power of the strobes by turning the aperture/shutter wheel on the camera? Is this really true and can you elaborate on this as well?

Will be deeply appreciated...

Juerg

Hi Juerg,

For Subtronic i set -/+ Ev camera "Flash Exposure Compensation" for -0.5...-1.0Ev then. I don't remember the exact value. Converter firmware understands such correction. Pay attention that this is rough solution for this aim, it does not solve the issues totally, because TTL curve has rather complicated shape. But it works acceptable in medium conditions sometimes. 

The best solution will be to build separate full curve for Subtronic. I think, it will be done in nearest future.

 

Modern TTL boards have possibility to switch TTL/M underwater. Usually, in menu any free camera function can be assigned for this aim.  If you mean V2 board, user has to choose "Auto FP" in camera menu for switching TTL/M. This command "Auto FP" is assigned for Manual mode in Converter's firmware.

In this Manual mode TTL Converter does not make pre-flashes, but only the main flash.

 

In such Manual mode the TTL Converter firmware can adjust uw strobe power manually. User rotates camera wheel and looks digits on camera service screen, the same digits are in the viewfinder display. Camera function "Flash Exposure Compensation" becomes assigned automatically for this functionality by Converter's firmware in this mode. So, there are 17 available steps of power, - this is much better than usually suggested by the strobe's own dial switch. And this is more comfortably, because user adjusts lighting keeping hands on camera. I use this feature rather often, shooting currently with #11031 TTL Converter.


Edited by Pavel Kolpakov, 21 April 2017 - 07:17 AM.






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