Using Autofocus and Setting Aperture (Contax N)
With any A7 series camera, A9, A6300 or A6500, switch between autofocus and manual focus using the switch on the camera body.
For other cameras, use the A/M switch on Contax N-E Speed Booster ULTRA or Contax N-E Smart Adapter.
With any A7 series camera, A9, A6300 or A6500, you may use the aperture ring of the lens in Aperture Priority and Manual Exposure modes by setting the switch on the adapter to the M (manual) position. In Programmed Exposure and Shutter Priority modes, the aperture ring is always ignored.
Aperture is always controlled on the camera body for other cameras.