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smudger1962

Advice on fibre optic cables

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Can anyone tell me if the bonded end connectors on fibre optic cables such as the Weefine and the sea and sea are a standard size. i have a Sea and Sea YS02 Strobe and a Fantasea FA6500 underwater housing. With the cable I have you have to attach the ends of the cable to the terminal plugs manually with a little screw, but its so tiny it is difficult to get a good nip on it and the end of the cable is prone to popping out. I want to get a one with bonded terminals but I don't know if they will fit at both ends.
Cheers.

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13 hours ago, smudger1962 said:

Can anyone tell me if the bonded end connectors on fibre optic cables such as the Weefine and the sea and sea are a standard size. i have a Sea and Sea YS02 Strobe and a Fantasea FA6500 underwater housing. With the cable I have you have to attach the ends of the cable to the terminal plugs manually with a little screw, but its so tiny it is difficult to get a good nip on it and the end of the cable is prone to popping out. I want to get a one with bonded terminals but I don't know if they will fit at both ends.
Cheers.

I just bought the Fantasea housing for the Sony a6400 and have been putting everything together; won't get to dive with it until Sept. 20.  The little screwdriver that is included with the Fantasea kit is junk and the fiber optic screw is hard to turn.  After punching a hole in the end of my finger, I reached into my desk draw and got a somewhat better screwdriver which worked much better, https://www.amazon.com/Stanley-6-Piece-Jewelers-Precision-Screwdriver/dp/B00002X29G?ref_=fsclp_pl_dp_2 .

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Damn those pre-underwater injuries! :P

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Thanks all

and RWE I have that same hole in my finger. Not sure what they are thinking about with that screwdriver. If I can find some of those elbows over here (UK) i might try them if not I'll try and get a cable with bonded end pieces. Also the cable I have is very thin and the more expensive ones look thicker and seem to be recommended for mirrorless and DSLR. Saying that I did try the cable i have and it seemed to trigger the strobe OK.

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OK, for you damaged finger chaps, you can get the "elbows" (fibre optic L-adaptors) in the UK from here:

http://www.nauticam.co.uk/s-s-strobe-adapter/

Boots sell Band Aids :rolleyes:

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This Wetpixel post from multiple contributors describes how to make one's own fiber optic cable, using Amazon supplies:

"DIY fiber optic writeup with parts.

http://wetpixel.com/forums/index.php?showtopic=60564."

 

Cable Plug Grommets: One can use of Amazon grommets as Sea&Sea-type cable plugs, just the grommets, without O rings, to connect my DIY Toslink f.o. cables to S&S YS-D2J strobes, they work just fine.

https://www.amazon.com/gp/product/B00XBG5U82/ref=oh_aui_detailpage_o03_s01?ie=UTF8&psc=1

The Toslink cable, 3 or 4 mm od,  can be shaved with a razor blade if too thick so it fits thru the grommet.  It can be glued into the grommet with rubber cement or ABS plumbers glue, then the end cut to refresh it. 

The grommets can  be fitted with 7 x 1 mm O rings from The O Ring Store, or just used bare.

=

I use Toslink fiberoptic cable from eBay, 3 to 4 mm o.d. and ~1.3 mm diam for the light fiber. It fires my two Sea&Sea YS-D2J's reliably in M mode, from a Subal ND800 or a Nauticam NA D500. My Toslink home made cables are tough, inexpensive and have consistently worked, no complaints.

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Exchange rates..... UK prices include 20% VAT... smaller market.......

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You can use as well some older Inon cables,
some of them had a screwed on shoe that will fit as well.
But better pick up than shipping to found out thats the wrong one...

Regards,
Wolfgang

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In reply, for cable from eBay one can get Digital Fiber Optic Audio Cable, TosLink for TV DVD AMP,
6 ft for $2.95 or 25 ft for $6.95.  The cable varies from 3 to 5 mm o.d..  To fit in the plug, the ends of the 5 mm cable are trimmed, like sharpening a pencil, with a sharp razor.
  
For the plugs one can use:
The plugs are about the right size to plug in the ports of the housing (i.e., Nauticam and Subal) and the Sea&Sea strobe..  To the end of the plug one can add a 1 x 5 mm i.d. O-ring, but I have not found this to be necessary. 
I cut the plug to a length of about 10-12 mm using a single edge razor.  If the plug to cable junction need to be secured, I glue it with rubber, or  plumbing ABS, cement.  
 
1.JPG.8be4616df7335e48cb38ccdc11865864.JPG
 
- -
To keep the cable from catching on outside objects, I wind it around the UL strobe float and through the holes in the UltraLight arms.
 
2.JPG.dad7209176cee8c3f5467cfbf3693f5d.JPG
 
(The strobe has a jacket made of scrap wet suit material and a shoe lace; it has worked well for several years to prevent minor damage.) 
I hope this answers your request, please let us know. 
 Best of luck!
Edited by Kraken de Mabini
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One detail:  Commercial fiber optic cables are spring coiled, but putting the cable in boiling water to coil it tends to cut down the light transmission.  Instead I just thread the cable through the strobe arms to secure it. 

Happy Photos!

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If you use the multi-core fiber and coil it carefully you will not see any appreciable transmission loss. The multicore fibers have bend radii of 1 mm or so, and no one will try to coil it with that kind of radius. At 1 mm bend the transmission loss of the 613 core fibers is < 0.5 dB or 6 % loss (if I remember how to convert dB to %). If you use the Toslink or other single core fibers then the bend radius (Asahi) is 30 mm for the same 0.5 dB loss so you will definitely see some loss for tightly wound cables.

Bill

Edited by bvanant

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In Inon strobes, the fiber optic cable has a 7 mm Sea&Sea type plugged into a holder, the holder screws on the strobe's optical trigger.  
 
1.JPG.da7d12183a473a6744b421fce55dc6d1.JPG
 
This holder sells for $11 + $5 shipping from HongKong or from eBay or  Reef Wreck and Critter, Australia, for $9 + tax + shipping.  In the U.S. one can buy the f.o. cable with holder from Backscatter for about $120 plus tax and shipping.
 
Or, one can make this f.o. cable holder for a few pennies from heat shrink tubing. One uses a short length of heavy wall heat shrink tubing, 18 mm diam. (3/4 inch) from the local hardware store, and paper matches to heat the tubing.
 
Heat one end of the heat shrink tube all around its edge, then immediately push and screw the tubing onto the strobe's sensor.  After a few seconds, unscrew the tube, reheat, and again screw it on the sensor.  Repeat several times until it screws on firmly. 
 
2020245733_1_resize.JPG.d168f8685f8552a60bc07ec7ec719481.JPG
 
  Now cut the tube to 30 mm long. Heat the other end all around to shrink it evenly and concentrically.  Concentric shrinking is needed so the light from the f.o. cable hits the sensor's center. Once the the tubing has shrunk to about 7 mm, plug in the Sea&Sea cable plug, and continue to heat until the shrink tubing holds the S&S plug firmly.  My holder took me about 10 minutes and 7 or 8 paper matches.
Edited by Kraken de Mabini
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