How was the optical correction for spherical aberration incorporated into the WFPC2?

Answer

The optical correction was built directly into the WFPC2's internal optics.

The Wide Field and Planetary Camera 2 (WFPC2) was built with the optical correction for spherical aberration integrated directly into its internal optics, meaning it did not need COSTAR to function.

How was the optical correction for spherical aberration incorporated into the WFPC2?

#Videos

FreeSchool Presents: Repairs to the Hubble Telescope - YouTube

HubbleSpacetelescopeopticsMirror