Adorama has launched a 400ws ring flash which uses a rechargeable lithium-ion battery. Part of the Flashpoint brand, it features a circular flash tube with an aperture capable of accommodating a lens barrel with a diameter of up to 3.5in/95mm. With a guide number of 82ft/25m the ring is powerful enough not only for macro work, but also headshots and full-length portraits. Read more
Articles: Digital Photography Review (dpreview.com)