RGBlue Step Up Ring M52-M67

Exclusive adapter ring to convert Rotation Ring Adapter thread from M67 to M52. Equipped with a lock O-ring for preventing loosening. This Step Up Ring enable Rotation Ring Adapter to attach on a housing or lens port compatible with the M52 filter thread.Caution: Do not substitute a commercially available step-up ring M52-M67. Otherwise, the equipment may be damaged.