Olympus MPLFLN 1.25X Objective – 0.04 NA Plan Fluorite EPI Brightfield

The Olympus MPLANFL 1.25× Objective is an ultra-low magnification, multi-mode objective designed for maximum field of view research microscopy applications. As part of Olympus's Plan semi-apochromat series, this objective combines the lowest practical magnification with compatibility across multiple imaging techniques including brightfield, differential interference contrast (DIC), fluorescence, and polarization microscopy, making it an essential tool for comprehensive specimen overview and multi-modal research applications.

At 1.25× magnification with a numerical aperture of 0.04, this objective provides the widest possible field of view, allowing you to see the entire specimen or large portions of it in a single view. This ultra-low magnification is ideal for initial specimen examination, locating specific features or regions of interest, and capturing context that would be impossible at higher magnifications. The extremely low magnification combined with exceptional depth of field makes it particularly well-suited for large specimens or three-dimensional samples.

The multi-mode capability of this objective makes it exceptionally versatile for research applications. Use brightfield for standard observation, DIC for enhanced contrast of transparent specimens, fluorescence for labeled samples, or polarization for analyzing birefringent materials — all with the same objective. This versatility eliminates the need to change objectives when switching between imaging techniques, streamlining your workflow and ensuring consistent positioning across different modalities.

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 across multiple imaging modalities, including creating panoramic views and large-area montages.

Compatible with upright infinity-corrected research microscopes via standard RMS thread mount, this objective integrates seamlessly into materials science, geology, biology, and multi-modal research workflows where maximum field of view is essential.