Contax/Yashica Lens to Pentax Optical Adapter

Focusing infinity.
No ROM connection on the adapter.
Diaphragm control of the lens is set manually.
Automatic diaphragm, auto-focusing,or any other functions will not operate correctly while using this adapter.
"Stop-down mode" will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body.