58mm Metal Lens Filter Adapter Ring for Canon SX70 HS, SX60 HS, SX50 HS, SX40 HS, SX30 IS, SX20 IS, SX10 IS, SX1 IS, SX540 HS, SX530 HS, SX520 HS Digital Camera
TUTORIAL | CANON PowerShot Adapter Ring For Lens Filter, Lens Hoods & Lens Caps - YouTube
67mm Metal Filter Adapter Ring for Canon PowerShot SX30 IS/SX40 HS/SX50 HS SX70HS Digital Camera Replacement Canon FA-DC67A Filter Adapter Tulip Flower Lens Hood UV Filter : Amazon.ca: Electronics