This video from Fotodiox walks you through installing their new $40 Tough E-Mount, which replaces the plastic parts inside the lens mount of Sony NEX E-Mount cameras like the FS100 and FS700 (the newer Sony a7S already has a full metal mount):

Here is the list of supported cameras:

  • Sony Alpha α7, α7r, a6000
  • Sony NEX-3, NEX-5, NEX-C3, NEX-5N, NEX-7, NEX-F3, NEX-5R, NEX-6
  • Sony NEX-VG10, NEX-VG20, NEX-VG30, NEX-VG900, NEX-FS100, NEX-FS700, NEX-EA50

If you're noticing excessive wiggle on your lenses when you're trying to focus, it may be worth checking out the Tough E-Mount. The adapter is especially useful if you're putting heavier lenses and adapters plus lenses on your camera.

You can find the adapter over on Amazon or at the Fotodiox website.

Source: Fotodiox