22nd January 2013
Metabones, the company who brought us the very successful Sony NEX to Canon EF Smart Adapter, have announced a new adapter that claims to increase aperture, sharpness and wide angle. Bold claims, but judging by the pre-production tests and optic technology involved true ones.
The Speed Booster which mounts between a Sony FS100/FS700 and a Canon EF lens, increases maximum aperture by 1 stop (hence its name), increases MTF and has a focal length multiplier of 0.71x. For example, the Canon EF 85mm f/1.2L II lens becomes a 59mm f/0.9 lens. The faster F-stop allows for shallow depth-of-field and a lower ISO setting for decreased noise.
How can this magical device work? It is essentially utilizing the fact that EF lenses are full-frame and the NEX is a smaller super 35mm sensor. There is a lens inside the adapter which is a focal reducer, the amount of light that would have covered a full-frame sensor is now focused onto the smaller sensor and is therefore more concentrated. This also means there won't be the same 'crop factor' you normally get when using EF lenses - for example, a Canon 50mm f/1.8 lens will become into a 35mm f/1.2 lens. To learn more about this technology you can read Metabones White Paper HERE.
These adapters are due for release in the next few weeks, you can place an order HERE.