Leica Tri-Elmar-M Aspherical 16-18-21 mm F/4.0 Aspherical MF Lens
Weighing in at only 335 grs the Leica Tri-Elmar-M Aspherical 16-18-21 mm F/4.0 Aspherical MF lens is an amazing lens! Especially when coupled with the 36MP Sony A7r mirror-less camera.