The new Ray Flash from ExpoImaging is a unique adapter for your hot-shoe flash unit that is designed to replicate the lighting effect that produced by traditional and much more expensive studio ring flash units. The Ray Flash was built to be lightweight and to be powered by your existing hot-shoe unit, it contains no heavy electronics.
What is a ring flash? First invented in 1952 by Lester A. Dine, it was originally used in dental photography to pinpoint light into a patient's mouth so that a clear picture of patents teeth could be made. In the 1970's, it was found to have other photographic benefits and took off in other genres.
The device itself is a circular photographic flash that fits around the lens of a camera. It is meant to provide even illumination on the subject, and is effective in reducing the number of shadows that can be produced by traditional flashes. In many ways, it works like a soft box in that it spreads the light from many angles and softens the shadows. It is now used in many different areas of photography, especially portrait and fashion photography.
The way the Ray Flash works is through little channels that direct the light from the flash around the ring. Closer to the top of the ring, the spot where your native flash is, there are no little reflectors, and as it channels to the bottom, more channels spread the light around the ring. One thing to note is that you will lose a little lighting power from your flash. It's about a full stop, so you will have to run your flash with a bit more power which in turn will affect your battery life, but that is one of the trade-offs for having a lighter unit.
Installation is really easy as well. As you can see in the image below you just slide the Ray Flash over the head of your flash unit and turn the lock on the top of the unit. Each Ray Flash is made for certain flash/camera combinations so you will need to make sure that you get the correct combinations. There is a list on the ExpoImaging site to make sure that you get the right one for your system.
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