Studiohut Type B 48 LED Macro Photography Ring Light with Lens Adapter for Nikon/Canon/Sony/Pentax/Tamron/Sigma Lens 48 LED Macro Ring Light great for Macro Photography Color temperature: 5000K-6000K Includes various sized step rings (49mm/52mm/55mm/58mm/62mm/67mm) Dual Power supply via 4xAA batteries or AC adapter Variable light source: Inside ring(I)/Outside ring(O)Whole ring(F)