egative Oculars are those in which the real, inverted image isformed within the ocular, the lower or field-lens serving to collect the image-forming rays somewhat, so that the real image is smaller than as if the field-lens were absent (Fig. 26). As the field-lens of the ocular aids in the… … \ 43. Positive Oculars are those in which the real, inverted image of theobject is formed outside the ocular, and the entire system of ocular lensesmagnifies the real image like a simple microscope (Fig. 16). Positive and negative oculars may be readily distinguished, as the dia-phragm is below the…
Microscopy
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