【Strong Anti-distortion】: The lens has an optical structure of 9 elements in 9 groups, including 1 aspherical glass, which has strong anti-distortion ability and can bring a better visual experience when shooting architectural or scenery. | 【Large Field of View】: This lens has a 18mm ultra wide angle,which bring a wider viewing angle, and can accommodate more elements. It is very easy to shoot large scenes, making the picture more expansive and layered. | 【Large Depth of Field】: The large depth of field of this lens is widely used in architectural photography, landscape photography, and large group photos of people, etc. It can well highlight the sense of space and three-dimensionality. | 【Rotary-shift Structure Design】: The bottom of the lens has a uniquely designed rotary-shift structure, which supports 360° rotation and 12mm (±6mm) translation,there will be a "click" every 45° rotation. Through the combination of axis shifting and rotation angle, photos from different perspectives can be combined into one picture with a larger and more magnificent scene through splicing. | 【Compatible Models】: This manual prime lens adopts an all-metal lens body design, which is small, light and well-made.It compatible with Leica/Panasonic/Sigma L mount mirrorless camera Leica T,TL,TL2,CL,Panasonic S1,S1M,S1R,S1RM,S1H,S1K,S5,S5K,S5C,SL,Sigma FP,FPL,etc.