Yongnuo MR-58 Macro Ring 58 LED Light Flash With 4 Ring Mounts Adapter for Canon Nikon Pentax Sigma Olympus 58 PCS of high brightness LED lamps. We have 4 adapter rings for this item, 52mm, 58mm, 62mm, 67mm Light Mode: The flash head will continuous output by the current mode of left / right setting, it suitable for taking photo or video recording. Flash Mode: The flash head will fire by the current left / right setting when testing or using, it suitable for taking photo at close range. MR-58 LED macro ring flash has 58 pcs high brightness LED as lighting source. A high-efficiency circuit design keeps the stability of the lighting outputs.