William Optics Adapter M48 Camera compatible with Canon EOS: connect your Canon EOS to the flattener
The William Optics M48 adapter connects your Canon EOS camera to accessories with an M48 thread, such as William Optics flatteners and reducers. The adapter clicks onto the Canon EF bayonet and screws into the M48 connection on the other side.
M48 has a larger free aperture than a classic T2 ring. This prevents vignetting (dark corners), especially on larger sensors. This version is matched to the William Optics Flat6AIII flattener-reducer and brings your sensor to the correct distance.




Features
- Lens mount: Canon EF, telescope side: M48
- Larger gap than T2, less vignetting
- Designed for the Flat6AIII flattener-reducer
- Exact fit, camera without play perpendicular to the optical axis
Compatibility
For Canon EOS cameras with the EF mount. For the mirrorless EOS R series, there is a dedicated version.
Specifications
| Camera connection | Canon EF |
| Telescope silk | M48 |
| Material | Aluminum, black anodized |
You can find more accessories for this brand at the William Optics brand page.





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