Metabones Speed Booster NEX Lens Adapter

NEX-7 with Metabones Speed Booster Lens Adapter with a Canon 50mm f/1.4 USM Lens

Metabones Speed Booster Sony NEX Lens Adapter Test by James Miller

So what does the Metabones Speed Booster NEX lens adapter do?

• Increase aperture by 1 stop. e.g. f/1.4 becomes f/1.0, which means more light to the sensor.
• Increases MTF, which means better resolution all across the frame compared to a standard lens adapter.
• Provides a focal length multiplier of 0.71x, NEX's APS-C 1.5 * SB 0.71 = 1.065, a 35mm lens = 37.7mm equivalent focal length.

Metabones Speed Boost Sony NEX Lens Adapter

The EF E-mount Speed Booster Lens Adapter shown above also provides automatic electronic aperture control, image stabilization with IS lenses, EXIF information, and autofocus (albeit slow.)

Read more about the Metabones Speed Booster from the Metabones web site and white paper.

It's pretty amazing what the NEX has spawned from the third party manufacturers.