Details

Date1880
AuthorAnon.
ContributionOil-immersion objectives took over from water-immersion objectives for the most demanding microscopical work.
ReferenceBradbury
NotesLenses with numerical aperture of 1.3 or more were being produced not only by Zeiss (under Abbe's direction) but also by such expert manufacturers as Tolles, and Powell and Lealand.
CategoryMicroscopy
Pathogen ClassGeneral

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