Meaning of normal magnification

nor'mal magnifica'tion

Pronunciation: [key]
— Optics. Optics.
  1. the magnification produced by a telescope or microscope such that the diameter of the exit pupil of the instrument is equal to the diameter of the pupil of the eye.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.