This is the original, flown Wide Field Planetary Camera 2 (WFPC2) that was installed on the Hubble Space Telescope during a servicing mission in December 1993, and removed during the last servicing mission in 2009. When the Hubble primary mirror was found to be faulty soon after launch in 1990, NASA decided to replace WFPC with a "clone" with adjusted optics to counteract the optical errors created by the flawed primary mirror. The clone also had improved performance, mainly with more robust charge coupled device detectors (CCDs).