Filter thread
Glossary Terms
The Filter Thread or Filter Ring is a threaded section inside the front of a lens to allow accessories such as filters and lens hoods to be attached.
Common filter system
| System | type | thread | description |
|---|---|---|---|
| Contax G | screw | 46mm | except 16mm and 21mm lens |
| Fuji GX680 | screw | 82mm | |
| Leica | snap on | A36 | early |
| Leica | screw | 39mm | late |
| Mamiya RB67 | screw | 77mm | |
| Olympus OM | screw | 49mm | |
| Pentax | scew | 49mm | |
| Pentax 6x7 | screw | 67mm |
