Zeiss Achroplan 20x Infinity Corrected Objective - RMS Thread

Zeiss Achroplan 20X Infinity Corrected Objective — RMS Thread (440040)

• 🔬 20X Achroplan — achromatic correction for reliable brightfield and phase contrast imaging
• 📐 NA 0.50 / WD 2.0mm — strong light-gathering with comfortable working distance at 20X
• ♾️ Infinity corrected — compatible with modern Zeiss infinity optical systems and tube lenses
• 🔩 RMS thread — standard thread for broad microscope compatibility beyond Zeiss platforms
• ✅ Condition: Excellent — flawless optics

🔧 Product Description

The Zeiss Achroplan 20X (catalog number 440040) is an infinity-corrected achromat objective from Zeiss's Achroplan series, designed for routine brightfield and phase contrast microscopy. At 20X with a numerical aperture of 0.50, it delivers the classic mid-range balance between magnification and field of view — wide enough to survey tissue architecture or surface features, yet powerful enough to resolve fine cellular and structural detail.

The Achroplan series is Zeiss's workhorse achromat line, offering solid chromatic and spherical aberration correction across the visible spectrum at an accessible price point relative to higher-correction Plan-Apochromat objectives. With a 2.0mm working distance and standard RMS threading, this objective integrates directly into Zeiss Axio and Axioskop platforms as well as any other RMS-threaded microscope nosepiece running an infinity optical system.

This unit is in excellent condition with flawless optics — no haze, fungus, scratches, or coating damage.

🔎 Typical Applications

• Histology and pathology slide review at mid-range magnification
• Cell biology and tissue culture observation
• Phase contrast microscopy on Zeiss Axio and Axioskop systems
• Routine brightfield microscopy in research and teaching labs
• Replacement or upgrade 20X objective on RMS-threaded infinity microscopes

📊 Key Specifications

📋 University and institutional purchase orders accepted. Contact us with any questions — we're happy to help you find the right objective for your Zeiss system.