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Metabones Canon EF to E-Mount Speed Booster
- Increase maximum aperture by 1 stop
- Increase MTF
- Makes lens 0.71x wider
- Optics designed by Caldwell Photographic in the USA (patent pending)
- Electronic integration of aperture diaphragm
- Partial autofocus support for late-model (post-2006) Canon-brand lenses
- Powered by camera body
- No external power source required
- Tripod foot is Detachable
- High performance 32-bit processor
- Efficient switched-mode power supply