Nikon CFI Fluor 20X Water Immersion / Water Dipping Microscope Objective

The Nikon CFI Fluor 20X Water Dipping Objective combines the superior optical quality of fluorite glass elements with the specialized design of a water dipping objective, making it an ideal choice for electrophysiology, neuroscience research, and live tissue imaging applications requiring high-magnification observation. Unlike conventional water immersion objectives that require a coverglass, this dipping objective is designed for direct immersion into aqueous solutions, making it perfect for imaging brain slices, organotypic cultures, and other live tissue preparations in physiological buffers. The fluorite optical design provides enhanced chromatic correction compared to standard achromat objectives, ensuring accurate color reproduction and improved contrast—particularly valuable in multi-channel fluorescence imaging, calcium imaging, and immunofluorescence experiments. With a numerical aperture of 0.50, this objective provides excellent resolution and light-gathering capability for detailed cellular imaging, while the 2mm working distance provides adequate clearance for micromanipulation equipment such as patch-clamp electrodes, microinjection needles, and stimulation probes. The water immersion design eliminates refractive index mismatches between the objective and specimen, ensuring optimal image quality when imaging into aqueous preparations. This objective is in excellent condition with flawless optics, offering professional-grade performance for laboratories using Nikon Eclipse FN1 and other upright research microscopes equipped for electrophysiology at an exceptional value.