Photographer Váncsa Domokos created a neat do-it-yourself camera accessory that uses optical fibers to control the direction and intensity of a flash unit’s light. Instead of having light come directly out of the flash unit, the accessory redirects it through a thick bundle of optical fibers, allowing you to point the light in any direction — and in different directions if you’d like.
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After buying a Yongnuo flash and finding its wireless capabilities “hit and miss”, Marcell of fiberstrobe decided to try out something he saw on a forum: using a fiber optic cable as a sync cord. The Yongnuo YN460-II can function as an optical slave, so the basic idea is to channel light from your camera’s flash into the light sensor of the strobe. To solve the problem of light leakage, Marcell also created an accessory using LEGO bricks, cardboard, and duct tape to fox the fiber to the sensor and protect it from direct sunlight.

DIY fiber sync cord (via DIYP)

No, this isn’t some advanced beam weapon from a sci-fi flick. It’s actually a do-it-yourself ring flash created using 150 optical fibers, with one end wrapped over the pop-up flash of the DSLR and the other end spitting out the photons in a ring-shape. If you want to learn how to make your own, here’s an in-depth writeup on how this was constructed.