Camera Makers
| Canon | Nikon | Fuji |
| Olympus | Sony | Leica Cameras |
| Panasonic | Samsung |
Lens Makers
| Tamron (USA) | Tamron (UK Importer) |
Hardware
| SRB-Griturn | Makers of bespoke adapters such as reversing rings and coupling rings. |
Retailers
| Jessops | |
| Warehouse Express |
| Canon | Nikon | Fuji |
| Olympus | Sony | Leica Cameras |
| Panasonic | Samsung |
| Tamron (USA) | Tamron (UK Importer) |
| SRB-Griturn | Makers of bespoke adapters such as reversing rings and coupling rings. |
| Jessops | |
| Warehouse Express |