RingFlash Resource

There’s a review of the Ray Flash on ePHOTOzine here: Ray Flash Adapter Review

In the review Peter Bargh says it’s "solidly built and much better than the lower priced Chinese copies that have emerged" and goes on to summaries by saying "The Ray flash Adaptor offers a low cost alternative to a studio unit for those who’ve already invested in on-camera Speedlites and similar. It’s really easy to use and provides a much better output than the macro flashes that are a similar price. If you want to create a ringflash style lighting this is recommended. The light is direct and evenly distributed, giving much better shadows than the light  coming direct from a hot-shoe mounted unit. Be prepared for manual focusing in low light as the flash assist beam is blocked."