The Inon Z240 (probably some of the other Inons as well) use a screw on blanking cap over the
optical sensor to shield it from being
optically fired as a slave or is replaced by a cap with
optical fibre attached for
optical firing. I bought some spars, open at the end, form Yuzo in Japan for 800yen ea.. Using a Toslink digital audio
cables, cut though the plug about 2mm up from the
cable strain serrations with a sharp knife. Trim the diameter on that cut end to just a little larger than the hole in the Z240 cap (that will ultimately hold it in the cap). Cut out the two supporting bridges between the
cable strain relief serrations so the cap will slip into the grove. Push the trimmed end through the cap hole with a blunt tool and your done. Allows the cap to rotate around the
cable for screwing onto the flash.
Produces a neat, strong
optical
cable connection for the flash in about 5 min. for little cost. If I can get the image upload to work the location to cut the
cable is indicated with the knife blade and the finished cap with
cable is shown.
The second photo shows a home coiled section of
optical
cable.
Charles