Amazon.com : Sensei 52-49mm Step-Down Ring : Camera Lens Filter Step Down Rings : Electronics
Black Metal 48mm-49mm 48-49mm 48 to 49 Step Up Ring Filter Adapter Camera High Quality 48mm Lens to 49mm Filter Cap Hood - AliExpress
Amazon.com : (2 Pcs) 49-52MM Step-Up Ring Adapter, 49mm to 52mm Step Up Filter Ring, 49mm Male 52mm Female Stepping Up Ring for DSLR Camera Lens and ND UV CPL Infrared Filters :
Breakthrough Photography 49mm to 52mm CNC Brass Step-Up Ring 49-52
Amazon.com : Altura Photo 40.5-49MM Step-Up Ring Adapter (40.5MM Lens to 49MM Filter or Accessory) : Camera Lens Filter Step Up Rings : Electronics
Andoer 18pcs 37-49-52-55-58-62-67-72-77-82mm Step Up / Step Down Lens Filter Metal Adapter Ring Kit - Walmart.com
Anodized Black Metal Filter Step Up Ring Set, Stepping Lens Adapter Rings 49-52mm 52-55mm 55-58mm 58-62mm 62-67mm 67-72mm 72-77mm 77-82mm (SRU) - Newegg.com
Cinema Step Up Ring 44/48/49/52/55/58/62/67/72/77/82mm To 80mmOD For 77mm Filter | eBay
49mm to 52mm Step-up Step Up Camera Lens Filter Ring 49-52 49mm 52mm 49 | eBay
B+W 52-62mm Step-Up Ring 65-041213 B&H Photo Video
Miscellaneous Brand 46-49mm Step-Up Ring Filter Adapter at KEH Camera
Andoer 18pcs 37-49-52-55-58-62-67-72-77-82mm Step Up / Step Down Lens Filter Metal Adapter Ring Kit - Walmart.com