MS Optical Super Triplet Perar photo by jonmanjiro Here is the smallest available lens for the Leica M mount and Luca A. has mounted it on his NEX-5. It is the MS Optical Super Triplet Perar Lens with a 35mm focal length, 52.5mm equivalent on the NEX and a maximum aperture of f/3.5. A Leica M to Sony E-mount adapter was used. Super Triplet Perar Lens Extended on the NEX-5. Super Triplet Perar Lens Collapsed. For reference: Super Triplet Perar on the Leica M8. Here are the key features of the Perar lens: Very high optical quality triplet formula lens. Ultra compact design, weight 75g, collapsible (4.2 height when collapsed). Premium quality Tantalum glass, superior to Trium and Lanthanum glass with best refractive qualities. Refined triplet design with two double thickness positive lenses, superior to Tessar design. Round aperture for smooth and pleasing bokeh (Edmund Optics, Made in USA) Minimum focus distance 0.8m. ALL glass surfaces multicoated, 97% light transmission. Vivid, real