40mm Objective 40x 0.78mm Working Distance NA 0.65 - Euromex

Take advantage of the 40x magnification, 0.65 numerical aperture and 0.78 mm working distance for high-detail observation in laboratory and educational settings; order the Euromex bScope BS.8240 directly via Metav Werkzeuge or ask our consultants if needed.

bScope BS.8240 microscope objective — 40x, NA 0.65 (Euromex)

bScope BS.8240 is a microscope objective intended for high-resolution transmitted-light microscopy, offering a balance between magnification and light-gathering capacity for routine laboratory use.

• 40x high magnification
• Numerical aperture 0.65 for detail
• Working distance 0.78 mm

High-definition imaging for routine microscopy

The optical design delivers 40x magnification combined with a numerical aperture of 0.65, which increases the amount of light collected from the specimen and directly improves resolving power. In practical terms, this combination enables clearer distinction of fine structures while keeping image contrast suitable for brightfield applications. The specification NA 0.65 indicates robust light-gathering ability compared with lower-NA objectives, so smaller features become visible without resorting to extreme illumination settings.

Compact working distance for close observation

A working distance of 0.78 mm suits close-range observation and high-magnification tasks where sample proximity is required. This short distance is common for objectives optimised for high resolution; it allows the objective to form sharp images of thin specimens on standard slides. When planning sample handling or mounting, the 0.78 mm parameter should be considered to avoid contact with coverslips or immersion media and to select compatible condensers and mounts.

Practical benefits in education and routine labs

The objective, from the bScope series, is appropriate for teaching laboratories and routine analysis where consistent, reliable optics are essential. The optical characteristics make it suitable for observation of histological sections, cellular detail in prepared slides, and other standard transmitted-light specimens. The specification balance reduces the need for frequent objective changes while supporting a wide range of classroom and workshop tasks.

Understanding numerical aperture and image quality

The numerical aperture (NA 0.65) determines both resolution and depth of field: a higher NA sharpens lateral resolution but narrows the depth of focus. For applications requiring maximal detail in a narrow focal plane, this objective provides a clear advantage. Conversely, when increased depth of focus is desired, contrast-enhancing techniques or alternative objectives with lower NA can be considered. The objective’s design is therefore a deliberate compromise to favour high-resolution detail in standard microscopy workflows.

For application advice or to source the Euromex bScope BS.8240 for laboratory use, contact Metav Werkzeuge GmbH in Emmerich; technical consultants are available to discuss suitability and integration into existing microscope setups

Technical data

• Article number: BS.8240
• SKU: BS.8240
• Brand: Euromex
• Series: bScope
• Type: Microscope objective

Facts

• Magnification: 40x
• Numerical aperture: 0.65
• Working distance: 0.78 mm

Special features

• Objective type: S40x/0.65 IOS EPLi
• Application: For microscopes
• Intended use: Laboratory and educational microscopy

FAQ

What magnification does this objective provide?
The Euromex bScope BS.8240 provides 40x magnification, suitable for detailed observation of prepared slides.

How does the numerical aperture affect performance?
With a numerical aperture of 0.65, the BS.8240 increases light collection and resolution, improving the visibility of fine specimen details under transmitted-light conditions.

Is the working distance suitable for standard slides?
The 0.78 mm working distance is designed for close-range imaging of thin specimens on standard slides; care with coverslip thickness and immersion media is recommended.

Which applications match this objective?
The objective is well suited to teaching laboratories and routine analyses where high-resolution transmitted-light microscopy is required.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com