Viltrox speed booster EF-E mount adapter can allow EF lens used on E-mount camera

Speed booster for Sony E mount camera

Description:

ed to allow canon EF Lens series lens to be used with Sony nex camera                              

2. Since it built-in optical lens(4 elements/4 groups), it can increase aperture by one f/stop. Allowing you to get in larger area of light and achieve the depth of field that you prefer.

3. Viltrox speed booster are quality made using precision-machined Alluminum Alloy with Chromium plating on both of the camera body and the lens side of the booster to ensure smooth and endurable mounting quality aesthetic.
4. With optical lens provided by our Janpanese partner and a surprisingly attractive price,

Specification:

Lens: Canon EF series lens. 

Camera: Sony E mount camera.
Magnification: 0.71
Aperture: to be increased by one f/stop
Optical Construction: 4 elements/4 groups