Nikon CFI Plan 4x Objective

The Nikon CFI Plan Achromatic 4× Objective is a versatile low-power microscopy lens designed to deliver broad overview imaging with consistent optical performance. With 4× magnification and a numerical aperture (NA) of 0.10, this objective provides a large field of view ideal for slide surveys, initial scanning, and specimen mapping.

Its CFI Plan Achromatic optical design reduces common optical errors such as chromatic and spherical aberrations, resulting in flat, uniform images across the visual field. This makes it great for brightfield microscopy, educational demonstrations, and contexts where large area coverage is essential.

The extended working distance of ~13 mm offers generous space between the objective and the specimen, accommodating larger slides, holders, or accessories without sacrificing clarity. The M25 threaded mount ensures broad integration with upright microscopy systems supporting infinity-corrected optics.