Passage: The new plant on the outskirts of Mainz-Neustadt ('new town') was opened in 1952. Here Marga Faulstich continued working on research and development of new optical glasses, with a particular focus on lenses for microscopes and binoculars. In addition to her research, Faulstich managed a crucible melt.

Question: what was Marge's main focus?
lenses for microscopes and binoculars