Simon Plössl was an Austrian optical instrument maker. Initially trained at the Voigtländer company, he set up his own workshop in 1823. His major achievement at the time was the improvement of the achromatic microscope objective.

What does a Plossl eyepiece do?

These eyepieces produce a 'standard apparent feld of view' of between 50° and 56° with most set at around 52°. ... This general purpose design gives good colour correction and an adequate feld of view at reasonable cost and they are often bundled with new telescopes.

Are Plossl lenses good?

Plössl eyepieces are good all-around performers, producing sharp images at the center of the field, but they have only four lens elements. Better edge correction with a short-focus telescope is one of the things you pay extra money for, and sophisticated eyepiece designs have as many as eight elements.