Olympus MS Plan Apo 150x Water Immersion Objective

The Olympus MSPlanApo 150x water immersion objective is one of the most capable and specialized reflected light objectives in the Olympus industrial lineup, combining 150x magnification with a 1.25 NA and apochromatic optical correction for the highest resolution reflected light imaging available on the Olympus platform. The apochromatic design corrects chromatic aberration across three wavelengths and spherical aberration across two, producing images with exceptional sharpness, contrast, and color fidelity — critical for resolving fine features on semiconductor wafers, thin film stacks, and precision optical surfaces. Water immersion at 1.25 NA provides significantly higher resolving power than dry or oil immersion objectives at comparable magnifications, while avoiding the contamination risks associated with immersion oil on sensitive semiconductor or optical specimens. At 0.14mm working distance, this objective is designed for use with flat, polished specimens in a water immersion configuration. The RMS thread mount provides direct compatibility with Olympus BX, MX, and BHM series reflected light stands. This is a rare and highly specialized objective — supplied in excellent condition with flawless optics, verified prior to shipment.