![Heliopan 494 Adapter 37mm to 43mm](http://thelafirm.com/cdn/shop/products/oxyt4znuwecm1dvp1enw__31270.1676014331_{width}x.jpg?v=1705022015)
The Heliopan 494 Adapter 37mm to 43mm Step-Down Ring offers a simple way of adapting a series of different lens mount sizes or types to one standard size. This allows using just one set of filters rather than having to duplicate filters of different sizes.