60mm Infinity EIS 40x/0.65 Plan Objective With 0.7mm Working Distance, M25 Thread - Euromex

Take advantage of a high‑resolution 40× Plan objective with a 0.65 numerical aperture and precise 0.7 mm working distance for sharp, flat-field images in demanding microscopy tasks; order directly via Metav Werkzeuge or consult our specialists for system matching.

Euromex Infinity EIS 40× Plan Objective DX.7940‑T — Infinity‑corrected, M25 thread, 0.7 mm WD

The Euromex Infinity EIS 40× Plan Objective DX.7940‑T is an infinity‑corrected plan lens designed for high‑contrast, high‑resolution microscopy with cover‑glass correction for reliably flat fields

• Infinity‑corrected Plan optics
• 40× magnification, 0.65 NA
• M25 thread for standard holders
• 0.7 mm working distance
• Cover‑glass correction

High‑resolution imaging for demanding inspection tasks

This objective combines Plan optics with an infinity‑corrected design and a 0.65 numerical aperture to deliver a consistently flat field and enhanced detail across the image plane. The optical correction reduces field curvature and edge aberrations, which benefits image analysis and documentation workflows; in practice this means fewer retakes and more reliable measurements when inspecting fine structures. For users familiar with microscopy terminology, the Plan designation indicates objective correction across the field, while the infinity system requires a compatible tube lens in the microscope stand.

Compact mechanical design that integrates with common systems

Engineered with an M25 thread, this objective fits standard nosepieces and accessory holders that accept M25 mounting, simplifying integration into existing microscope turrets. The specified working distance of 0.7 mm is optimised for high‑power observation of coverslipped specimens; the short clearance is ideal for thin biological sections and polished material samples but requires cautious focusing and sufficient clearance planning during automated stage movements. The built‑in cover‑glass correction compensates for typical cover‑slip thickness variations and maintains image performance without additional correction collars.

Proven suitability for laboratory and educational use

Precision glass and careful assembly ensure stable optical performance for routine laboratory inspection, teaching environments and light industrial microscopy. The lens is particularly useful where reproducible, high‑contrast images are required for routine documentation or comparative analysis. The robust optical design supports confident imaging across multiple sessions, contributing to reliable workflows and reduced downtime in inspection chains.

Practical notes on optical performance and maintenance

The 0.65 NA represents a balance between resolving power and depth of field at 40× magnification: higher NA improves lateral resolution but reduces depth of field, so illumination and focus strategy should be chosen accordingly. Routine maintenance—gentle cleaning with lens tissue and appropriate solvents, avoidance of contact with the front element and secure storage—preserves performance over time. As an optical component intended for precision use, correct handling minimises the need for recalibration and helps sustain consistent image quality.

For technical matching, supply reliability and purchase assistance, contact Metav Werkzeuge — Metav’s specialists will advise on integration into existing microscopes and ensure prompt delivery from Emmerich; email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: DX.7940-T
• Product type: Objective / lens
• Manufacturer: Euromex

Data

• Magnification: 40×
• Numerical aperture: 0.65
• Working distance: 0.7 mm
• Thread: M25

Special features

• Infinity‑corrected design
• Plan optics (flat field correction)
• Cover‑glass correction
• SKU: DX.7940-T
• Label: Infinity EIS 60mm Plan SAPOLi 40x/0.65 Objective (cover‑glass correction)

FAQ

Which microscope systems is this objective compatible with?
The objective is designed for infinity‑corrected microscopes using an M25 nosepiece; the Euromex Infinity EIS 40× Plan Objective DX.7940‑T mounts to standard M25 holders and integrates with stands that provide an infinity tube lens.

What does the 0.7 mm working distance mean for sample preparation?
A 0.7 mm working distance indicates a short clearance between the front element and the specimen, suitable for coverslipped samples and thin sections; careful stage movement and proper sample mounting are recommended when using the objective.

Is the lens corrected for cover glasses?
Yes — the objective includes cover‑glass correction, which compensates for common cover‑slip thicknesses and helps maintain sharpness and colour fidelity across the field.

How does the 0.65 numerical aperture affect image quality?
A 0.65 NA offers a good compromise between lateral resolution and depth of field at 40× magnification; it improves detail resolution while requiring considered illumination and focus practice for optimal results.

What maintenance helps preserve optical performance?
Gentle cleaning with appropriate lens tissue and solvent, secure storage and avoidance of contact with the front element will preserve the objective’s performance and longevity.

Manufacturer / Responsible: Euromex Microscopen bv; Typograaf 8; 6921 VB Duiven; The Netherlands; info@euromex.com