The Kenro Macro Ring Flash is designed to enable shadow-free, close up photography, it has numerous applications in scientific, industrial, macro, close up, medical, dental, nature and small product photography. With a guide number of 14 (ISO 100), LED modelling lamps and independent A:B power adjust functions, this ring flash has all the key specs for most macro photographers. It has TTL, manual and multi modes*, as well as rear curtain sync and a large backlit LCD screen. Supplied complete with eight different sizes of adapter ring. This product comes with a 2-year limited warranty.