Nikon CFI Plan Apo Lambda 4x Objective Lens | Wide-Field, High-Resolution

The Nikon CFI Plan Apo Lambda 4× Objective is a precision microscope objective designed for wide-field imaging with exceptional flatness and color fidelity. As part of Nikon’s Plan Apochromat Lambda series, this lens delivers ultra-flat, high-resolution images with minimized chromatic and spherical aberrations from center to edge — making it well-suited for applications requiring broad, uniform imaging across a large field number (~25 mm).

With 4× magnification and a numerical aperture (NA) of 0.20, this objective provides a generous field of view and strong light collection, ideal for overview imaging, slide surveys, and documentation workflows. The large working distance of approximately 20 mm provides practical space above the sample, allowing flexibility when using larger specimen holders, culture dishes, and accessory tools during imaging.

Built with Nikon’s CFI Plan Apochromat Lambda optical design and optimized for wide-field performance, this objective delivers consistent high-contrast images across traditional brightfield and fluorescence modes, with true-to-color results even at the edges of the field — a significant advantage for digital imaging, stitching, and high-content analysis.

The objective features a standard M25 × 0.75 threaded mount, ensuring compatibility with most Nikon research microscopes that use infinity-corrected optics systems, making it a versatile addition to advanced microscopy setups.