Brand new Viltrox speed booster lens adapter ring EF-E

Description: 

1. It can allow Canon EF lens to be used in Sony NEX series camera with auto focus. 
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, it is surely a smart choice to choose Viltrox f/booster.

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

Packing: 
1. EF-E speed booster
2. front and rear cap
3. a beautiful plastic box