Definitions

1. adjective

In optics, placed between the eyepiece and the objective lens in a compound microscope, allowing a wider field of view and a lower magnification than the objective.

“The subfocal lens allowed the scientist to observe a larger area of the specimen without sacrificing too much magnification.”

2. noun

A subfocal lens or system used in a compound microscope.

“The subfocal provided a clear and detailed view of the microorganism.”