42-52 mm átalakító gyűrűk (bővítő) (meghosszabbítva: 3252169121) - Vatera.hu
52 MM - 40,5 MM Filter Adapter Step Down Adapter 52-40, 5 4403017045006 | eBay
37-52 mm szűrőmenet átalakító bővítő (meghosszabbítva: 3257073392) - Vatera.hu
PA 37mm adapter ring for 52mm filters or accessories. USA | eBay
Set of 37mm Step-down Adapters | Dreamgrip.com
52 mm Steps Up/Down To Step-Up Rings 37 mm To Fit Lens Front Camera Lens Filter Rings & Holders for sale | eBay
Amazon.com : (2 Pcs) 37-46MM Step-Up Ring Adapter, 37mm to 46mm Step Up Filter Ring, 37mm Male 46mm Female Stepping Up Ring for DSLR Camera Lens and ND UV CPL Infrared Filters :
Amazon.com : 43-52 mm 43 to 52 Step up Ring Filter Adapter : Flash Adapter Rings : Electronics