Olympus MPlanFL N 5X Epi Objective | 0.15 NA, BD, Infinity Corrected

The Olympus MPLANFL 5× BD Objective is a versatile, high-performance objective engineered for industrial microscopy applications requiring both wide-field overview imaging and detailed defect detection. As part of Olympus's Plan semi-apochromat series, this objective combines a 12 mm working distance with dual brightfield/darkfield imaging capability, making it an essential tool for materials analysis, quality control, and failure analysis in manufacturing and research environments.

The brightfield/darkfield (BD) design allows you to switch between two complementary imaging modes without changing objectives. Brightfield mode provides standard reflected light imaging for general observation, while darkfield mode dramatically enhances contrast by illuminating the specimen at oblique angles — revealing surface defects, scratches, grain boundaries, and other features that would be invisible in brightfield alone.

At 5× magnification with a numerical aperture of 0.15, this objective delivers a wide field of view with excellent depth of field, making it ideal for initial specimen survey, large-area inspection, and locating regions of interest before switching to higher magnifications. The 12 mm working distance provides good clearance for most industrial samples while maintaining excellent optical performance.

The MPLANFL optical design ensures flat-field imaging with minimal distortion from center to edge, while the plan semi-apochromat correction delivers excellent color fidelity and chromatic aberration control. This combination makes the objective well-suited for both visual inspection and digital documentation of industrial samples.