Freewell 72-77mm Step Up Ring

• What problems does it solve? Step Up rings are very common but this is unlike other this innovative step-up ring from Freewell is magnetic as well as thread filter system so you can now use Freewell magnetic filters as well as your threaded filters in one step-up ring• Built: Made of CNC machined aluminum with black color to avoid any reflection or leakage during your photography• How do I find my filter thread size? Your lens thread size will be printed underneath your lens cap or written somewhere on the lens barrel