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  3. MEIJI 99131

MEIJI 99131 Flat Field Din Objective Lens S. 40 0.65 160/0.17

99131 Meiji Japan Sn S. Flat Field 40 0.65 160/0.17 Din Objective Lens - Used

( Brand: Meiji ), ( Manufacturer Part Number: 99131 ), ( Part Type: Len ), ( Country Of Origin: Japan )

Review MEIJI Japan Sn Flat Field 40 0.65 160/0.17 Din Objective Lens Used

The **Meiji 99131 Flat Field 40x Objective Lens (NA 0.65, 160mm Working Distance, 0.17mm Cover Glass Thickness)** is a precision-engineered optical component designed for high-resolution microscopy and imaging applications where exceptional clarity, minimal distortion, and consistent field performance are critical. This objective lens is part of Meiji s advanced line of optical solutions, tailored for researchers, industrial inspectors, and scientists who demand uncompromising image fidelity in their observations. With a **40x magnification**, it strikes an ideal balance between high detail and a manageable field of view, making it suitable for examining fine structural features in materials, biological samples, or semiconductor surfaces with remarkable precision. The **0.65 numerical aperture (NA)** ensures a wide cone of light collection, enhancing contrast and resolution while reducing spherical aberrations that can degrade image quality in conventional objectives. This is particularly advantageous for applications involving transparent or semi-transparent specimens, where depth of field and light-gathering efficiency are paramount.

One of the most distinctive features of this lens is its **flat-field correction**, a design innovation that minimizes curvature of field errors across the entire image plane. Unlike traditional objectives that may exhibit barrel or pincushion distortion especially at higher magnifications the 99131 delivers a uniformly sharp and distortion-free field, which is essential for quantitative analysis, photomicrography, and tasks requiring precise dimensional measurements. The **160mm working distance** provides ample space between the lens and the specimen, accommodating thicker samples, specialized sample holders, or additional optical components without compromising focus or image quality. This extended working distance also reduces the risk of accidental contact with delicate specimens, making it a safer choice for live-cell imaging or sensitive materials.

The lens is optimized for use with **0.17mm-thick cover slips**, a standard thickness that aligns with many conventional microscopy setups. This specification ensures that the optical path remains consistent and aberration-free, whether the lens is paired with a standard microscope or integrated into a custom imaging system. Meiji s meticulous manufacturing process, combined with high-quality optical glass and anti-reflective coatings, minimizes flare and ghosting, resulting in images that are both vibrant and free from unwanted artifacts. The robust mechanical construction of the lens further ensures durability, making it resistant to thermal fluctuations and mechanical stress qualities that are vital for long-term use in demanding laboratory environments.

Whether applied in materials science for analyzing microstructures, biological research for high-resolution cell imaging, or quality control in semiconductor fabrication, the Meiji 99131 Flat Field 40x objective lens delivers a level of optical performance that bridges the gap between conventional and advanced microscopy. Its combination of high magnification, flat-field correction, and extended working distance makes it a versatile tool for professionals who require both depth of field and image uniformity without sacrificing resolution. For those seeking a lens that elevates their microscopy capabilities to new heights of precision and reliability, the Meiji 99131 is an exemplary choice.

### **Pros and Cons of buying a Meiji 99131 Flat Field 40x/0.65/160mm Objective Lens**

#### **Pros**

1. **High Magnification and Resolution** The 40x magnification provides detailed imaging, making it suitable for high-resolution microscopy, cell biology, and material science applications. The numerical aperture (NA) of 0.65 ensures good light-gathering capability, improving image clarity.

2. **Flat Field Design** The flat field correction minimizes distortion at the edges of the field of view, resulting in a more uniform image across the entire viewing area. This is particularly useful for photography and documentation where edge sharpness is critical.

3. **Long Working Distance (160mm)** The extended working distance allows for easier sample manipulation, better focus adjustment, and compatibility with larger or more complex sample holders. This is beneficial for live-cell imaging or experiments requiring frequent adjustments.

4. **Compatibility with Microscope Systems** This objective is designed for standard microscope setups, including brightfield, phase contrast, and fluorescence configurations. It can be used with most inverted and upright microscopes, depending on the mount type (typically 20mm or 26mm).

5. **Durability and Optical Quality** Meiji objectives are known for their precision engineering and optical performance. The lens is likely made with high-quality glass and coatings to reduce aberrations and improve contrast.

6. **Versatility in Research and Education** Suitable for a wide range of applications, including histology, microbiology, and materials analysis. Its balance of magnification and working distance makes it a practical choice for both research and educational settings.

7. **Cost-Effective for Mid-Range Needs** Compared to higher-end objectives from brands like Olympus or Zeiss, the Meiji 99131 offers a more affordable option without sacrificing significant performance, making it accessible for labs with moderate budgets.

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#### **Cons**

1. **Lower Brand Recognition** Meiji is not as widely recognized as leading microscope manufacturers like Nikon, Zeiss, or Olympus. This may lead to fewer support resources, limited availability of replacement parts, or less trust in long-term reliability compared to established brands.

2. **Potential for Limited Warranty or Support** Depending on the region, Meiji s customer service and warranty coverage may be less robust than that of major brands. Some users report difficulties in obtaining repairs or replacements under warranty.

3. **Compatibility Issues with Advanced Systems** While it works well with standard microscopes, advanced or specialized setups (e.g., confocal microscopy, super-resolution techniques) may require higher-end objectives with additional features like immersion correction or specialized coatings.

4. **Durability Concerns** Some users report that Meiji optics, while functional, may not be as rugged as those from premium brands. Frequent use or rough handling could potentially lead to misalignment or damage over time.

5. **Limited Availability of Accessories** Finding compatible filters, adapters, or additional objectives from Meiji may be more challenging than with major brands, which often have extensive accessory lines.

6. **Optical Performance at Extremes** While the 0.65 NA is strong for its magnification, it may not match the performance of higher-end objectives (e.g., 1.4 NA immersion lenses) in terms of resolution or contrast for the most demanding applications.

7. **Potential for Outdated Design** Meiji objectives may not incorporate the latest optical innovations (e.g., advanced coatings for fluorescence or phase contrast) found in newer models from competitors.

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### **Conclusion**

The Meiji 99131 40x/0.65 flat field objective lens is a **practical and cost-effective choice** for users who prioritize magnification, working distance, and flat-field performance without needing the highest-end optics. It excels in applications requiring detailed imaging with minimal edge distortion and is well-suited for research, education, and general microscopy. However, its **lower brand reputation, potential support limitations, and lack of advanced features** may be drawbacks for users who require long-term reliability, specialized applications, or cutting-edge optical performance.

If your primary needs align with its strengths such as brightfield or phase-contrast imaging, live-cell work, or budget-conscious microscopy this lens is a **solid investment**. However, if you anticipate using advanced microscopy techniques or require extensive warranty support, investing in a higher-end objective from a well-established brand may be more prudent in the long run.

### **Recommendation**

- **Buy the Meiji 99131 if:**

- You need a reliable 40x objective for general microscopy, histology, or educational purposes.

- You require a long working distance for sample manipulation or compatibility with specific setups.

- You are working within a budget and prioritize performance over brand prestige.

- Your microscope system is standard and does not require specialized optics.

- **Consider alternatives (e.g., Olympus UPlanFL, Nikon Plan Fluor) if:**

- You require long-term reliability, extensive warranty coverage, or advanced optical features.

- Your work involves high-resolution fluorescence, confocal microscopy, or other demanding techniques.

- You need better support and availability of accessories.

- You are willing to invest slightly more for optics from a brand with a proven track record in microscopy.

Details:

Meiji Japan SN 99131 Flat Field 40 0.65 160/0.17 DIN Objective Lens - Used,: Brand: Meiji. Type: Objective Lens. Condition: Used in Great Condition.

part #: 99131 price

  • $51.10

specifications microscopepartzo:

  • brand: Meiji
  • mpn: 99131
  • part type: Len
  • country of origin: Japan

offer microscopepartzo:

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  • started: February 10, 2026
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general microscopepartzo:

  • Medical/Lab Equipment Attachments Accessories > Microscope Parts Accessories > Other Microscope Parts Accessories
  • condition: Used
part type: len, country of origin: japan,
category: business & industrial > medical/lab equipment attachments accessories > microscope parts accessories, sku: 12265910704540881,
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