Speed booster for Leica lens to be used on Sony E mount camera

Description:

ed to allow canon L/R 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 L/R series lens. 

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