Hi,
From Wikipedia (permissions granted)
Georg Simon Plössl (1794-1868) was an Austrian optical instrument maker. He trained initially with the
Voightländer company, but later set up his own workshop in 1823. He improved the quality of
achromatic microscope objective lenses, but is best known for the eponymous telescope eyepieces made following his
1860 design, and extensively used by amateur astronomers (see
Eyepiece)
Cheers
GeoffW