This test was done using the Sony Nex-7 and the Canon EF 135mm f/2 L Lens and the Fotodiox Pro Lens Mount Adapter with Built-in Aperture iris for Canon EF to Nex (E-Mount)


http://sonyalphalab.com/2012/01/fotodiox-pro-lens-mount-adapter-with-built-in-aperture-iris-does-the-aperture-do-anything-tested-on-sony-nex-7-with-canon-ef-135mm-f2-l-lens/

Best,
Jay