Condition: Used

A used Nikon Plan Fluor 20x/0.50 DIC M objective with infinity correction (∞/0.17) and a 2.1 mm working distance. Part number MRH00201, this dry air objective mounts via M25 x 0.75 thread and is suited to a wide range of Nikon Eclipse-platform microscopes.

What is typically included:
• Nikon Plan Fluor 20x/0.50 DIC M objective (MRH00201)

The Nikon CFI Plan Fluor 20x/0.50 DIC M (part number MRH00201) is part of Nikon's CFI60 infinity-corrected optical system, combining the performance of fluorite glass elements with flat-field correction and broad-spectrum transmission. Designed for high-contrast fluorescence observation and photomicrography, the Plan Fluor series delivers exceptionally high transmission from the ultraviolet to the infrared with outstanding field flatness. As a multipurpose objective, it supports brightfield, fluorescence, polarising, and differential interference contrast (DIC) microscopy from a single lens.

The CFI60 system utilises a parfocal distance of 60 mm — a Nikon standard that enables longer working distances while maintaining high numerical aperture, producing crisp, high-contrast, high-resolution images.

Key Specifications:
Magnification: 20x
Numerical Aperture (NA): 0.50
Optical Correction: Plan Fluor (Plan Fluorite / Plan Semi-Apochromat)
Tube Length: Infinity (∞)
Coverslip Thickness: 0.17 mm
Working Distance (WD): 2.1 mm
Immersion Medium: Dry (air)
Field Number (OFN): 25
Thread Size: M25 x 0.75
Parfocal Distance: 60 mm
DIC Compatibility: DIC M (requires appropriate Nikon DIC prism/slider)
Optical System: Nikon CFI60 infinity-corrected
Compatible Microscopes: Nikon Eclipse E200, E400, E600, 50i, 55i, 80i, 90i, Ci, and Ni series
Part Number: MRH00201

The Plan Fluor objective class (also referred to as plan semi-apochromat) is corrected for four wavelengths, making it well suited for colour photomicrography and multi-channel fluorescence imaging. High UV-to-NIR transmission makes these objectives ideal for demanding fluorescence applications where signal brightness and flat-field uniformity are critical.

Nikon CFI Plan Fluor Series – product overview page on Nikon Instruments Europe: Download PDF

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