Nikon CFI Plan 40x Objective

40× general-purpose objective with excellent flat-field correction and broad application support.

• 🔬 40× Magnification, NA 0.65 — Strong resolution with solid light-gathering ability.
• 🧠 CFI Plan Achromatic Optical Design — Flat field and reduced chromatic aberrations for crisp imaging.
• 📸 Broad Transmission Across Visible Spectrum — Great for brightfield, darkfield, and basic fluorescence.
• 📏 Working Distance ~0.66 mm — Optimized for general microscopy tasks.
• ⚙️ M25 Threaded Mount — Fits many upright microscopes with infinity-corrected optical tubes.

🧪 Product Description (Long-Form)

The Nikon 40× CFI Plan Achromatic Objective is a versatile microscope objective designed to support a wide range of general microscopy applications — from routine observation to imaging in brightfield and basic fluorescence. With 40× magnification and a numerical aperture (NA) of 0.65, this objective balances resolution and contrast with practical working distance for reliable performance in research, clinical, and educational labs.

Built with Nikon’s CFI Plan Achromat optical design, the lens corrects chromatic and spherical aberrations to deliver flat, sharp images across the entire field of view. This makes it an excellent choice for documentation, slide analysis, and multi-modal workflows where consistent imaging quality matters.

With a working distance of approximately 0.66 mm, this objective provides room to focus on biological specimens without immersion media, while still maintaining good numeric aperture performance. The M25 × 0.75 threaded mount ensures compatibility with a wide range of upright microscopes that use infinity-corrected optical systems — making this a flexible and dependable lens for everyday microscopy.

🔎 Typical Applications

• Brightfield microscopy
• Darkfield imaging
• Basic fluorescence imaging
• Educational and clinical microscopy
• Sample documentation and analysis

📊 Key Specifications