| Round Filters- Diameter | ||
| Series 5 | 1 3/16″ | 27.6mm |
| 1 10/16″ | 40.5mm | |
| Series 6 | 1 5/8″ | 41.3mm |
| 1 14/16″ | 48mm | |
| Series 7 | 2″ | 50.8mm |
| Series 8 | 2 1/2″ | 63.5mm |
| Series 8 1/2 | 2 15/16″ | 74.6mm |
| Series 9 | 3 1/4″ | 82.6mm |
| 4 1/2″ | 115mm | |
| 5 1/2″ | 138mm | |
| 6″ | 152mm | |
| Square / Rectangular Filters | |
| 2″ x 2″ | 50 x 50mm |
| 3″ x 3″ | 76 x 76mm |
| 4″ x 4″ | 102 x 102mm |
| 4″ x 5.65″ (PSR) | 102 x 143mm |
| 4″ x 6 ″ | 102 x 152mm |
| 5″ x 5″ | 127 x 127mm |
| 6″ x 6″ | 152 x 152mm |
| 6.6″ x 6.6″ | 167 x 167mm |
Filters are known by the sizes shown in bold