This objective is part of the series of metallurgical lenses for reflected light examination of samples in the materials sciences. The objective is corrected for uncovered samples and this must be adhered to strictly. The tubelength correction accommodates the extra length required by the various types of vertical illuminators. Characteristics include:.
Magnification 20x
Numerical aperture 0.40
Tube length 215mm
Non flat-field achromatic correction
Objective thread RMS standard

The lenses are designed for work in incident light brightfield. They are in excellent cosmetic condition and superb optical condition.

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