Metabones SPEF-M43-BT4 – Canon EF to Micro Four Thirds Speed Booster ULTRA 0.71x
GTIN: 4897050181850
Speed Booster ULTRA 0.71x with autofocus for Canon EF lenses on Micro Four Thirds cameras, including the original Blackmagic Pocket Cinema Camera.
Metabones SPEF-M43-BT4 – Canon EF to Micro Four Thirds Speed Booster ULTRA 0.71x
The 0.71x focal reducer widens the field of view of Canon EF lenses, increases maximum aperture by 1 stop and improves MTF. The electronics handle autofocus, aperture and stabilization. The official compatibility list includes, among Blackmagic cameras, the Micro Cinema Camera and the Pocket Cinema Camera.
Features
- Patented 5-element/4-group optical design with ultra-high index tantalum glass by Caldwell Photographic (USA)
- Camera-controlled autofocus and aperture; powered by the camera or by an external 5V source (not included)
- Smooth iris with recent Canon (2009+), Tamron SP (2013+) and Sigma (2016+) lenses
- Supports IS lenses and in-body stabilization of Panasonic GX7, GX8, GX80/85 and Olympus cameras
- Cinema EOS support (CN-E 18-80mm T4.4 L) with AF (external 5V power via micro USB), auto iris and servo zoom
- EXIF data (focal length, aperture, zoom)
- Detachable Arca Swiss tripod foot, felt-flocked opening
Note: Does not fit the OM System OM-1 due to physical interference. EF-S lenses need modification or remain incompatible (third-party DX lenses fit). AF may not work if the resulting aperture is smaller than f/5.6 after boost. The Pocket Cinema Camera 4K is not in the official list for this model.
Specifications
| Lens mount | Canon EF |
|---|---|
| Camera mount | Micro Four Thirds |
| Magnification | 0.71x |
| Aperture gain | +1 stop |
| Electronics | electronic contacts, autofocus, camera-controlled aperture, 5V micro USB input |
| Metabones code | MB_SPEF-M43-BT4 |
| Product Condition | New |
|---|---|
| Manufacturer | Metabones |
| manufacturer code | SPEF-M43-BT4 |
| Ean | 4897050181850 |