PK_Tether – Tethering Software for Pentax DSLR Cameras PK_Tether allows connecting and controlling Pentax cameras from the PC. The list of currently supported models include: Pentax k-x, K7, K5, k-r, K20D, K10D, K200. In the program, it is possible to: set camera parameters like: shutter speed, aperture, ISO,