CowboyStudio Macro Ring LED Light, Compatible with Canon/Sony/Nikon/Sigma lenses 6 x Adapter Rings Included! (49mm/52mm/55mm/58mm/62mm/67mm) Specially designed ring shape is perfect for MACRO photography (close-up). This light has a double-duty power supply design which allows you to use 2 x AA batteries or This lighting unit provide a continuous lighting (not flashing), the continuous lighting allows you handle exposure easily. Also great for portrait photography. DC power via the included AC adapter for different situations.