ZEISS 440330-9901 Ec Plan Neofluar Microscope Objective 10X/0.3

( Brand: Zeiss ), ( Manufacturer Part Number: 440330-9901 ), ( Model: 440330-9901 10X/0.3 ), ( Country Of Origin: Germany ), ( Intended Use/discipline: Biological Laboratory, Medical Laboratory )

Review ZEISS Ec Plan neofluar 10x/0.3 Microscope Objective

The **Zeiss EC Plan-Neofluar 10x/0.3** objective lens (part number **440330-9901**) is a precision-engineered optical component designed for high-performance microscopy, embodying Zeiss s commitment to uncompromising clarity, durability, and versatility. Part of the **EC Plan-Neofluar** series, this lens combines the advanced **Neofluar** design a refinement of the classic Plan-Apochromat with **EC (Extended Coverage)** technology, ensuring exceptional image quality across a broad range of working distances and immersion conditions. With a **10x magnification** and a **numerical aperture (NA) of 0.3**, it strikes an ideal balance between field of view and resolution, making it well-suited for both routine laboratory work and specialized applications in life sciences, materials research, and industrial inspection.

The lens features a **corrected flat field** design, minimizing curvature of field and ensuring a sharp, distortion-free image across the entire field of view, which is critical for accurate measurements and detailed documentation. Its **long working distance (approximately 16.5 mm)** accommodates a wide range of sample preparations, including thick specimens, wet mounts, and even certain types of immersion techniques, reducing the need for invasive sample manipulation. The **EC (Extended Coverage) modification** further enhances its adaptability, allowing for consistent performance with cover glasses ranging from **0.10 mm to 0.17 mm in thickness**, a flexibility that broadens its applicability in diverse microscopy setups without requiring frequent lens adjustments.

Constructed from high-quality optical glass and precision-machined metal components, the **EC Plan-Neofluar 10x/0.3** is built to withstand rigorous use in demanding environments. The lens barrel is designed for seamless integration with **Zeiss s modular microscope systems**, including those equipped with **Plan-Apochromat** or **EC Plan-Neofluar** infinity-corrected optics, ensuring optimal compatibility with phase contrast, fluorescence, and differential interference contrast (DIC) configurations. Its **parfocal design** aligns effortlessly with other objectives in the series, minimizing refocusing time and enhancing workflow efficiency. Additionally, the lens incorporates **Zeiss s proprietary anti-reflection coatings**, which minimize ghosting and flare, delivering a high-contrast image even under challenging lighting conditions.

Beyond its technical specifications, the **440330-9901** exemplifies Zeiss s dedication to **long-term reliability and optical consistency**. The lens is engineered to maintain its performance over extended periods of use, with robust mechanical stability and resistance to thermal fluctuations, making it a dependable choice for both educational and professional settings. Whether used in **brightfield, phase contrast, or low-magnification fluorescence applications**, this objective lens provides a seamless transition between imaging modes, thanks to its well-corrected aberrations and minimal chromatic distortion. For researchers and technicians who demand precision without compromise, the **Zeiss EC Plan-Neofluar 10x/0.3** represents a cornerstone of modern microscopy, blending innovation with the enduring legacy of Zeiss optical excellence.

### **Pros and Cons of buying a Zeiss 440330-9901 EC Plan-Neofluar 10x/0.3 Microscope Objective**

#### **Pros**

1. **High-Quality Optics** The EC Plan-Neofluar series is known for its excellent optical performance, delivering sharp, distortion-free images with minimal chromatic aberration. This is particularly useful for brightfield and phase-contrast microscopy.

2. **Corrected for Common Aberrations** The objective is designed with extended correction (EC) for spherical and chromatic aberrations, ensuring consistent image quality across the field of view. This is beneficial for both routine and advanced imaging tasks.

3. **Compatibility with Modern Microscopes** The 10x magnification and 0.3 numerical aperture (NA) make it a versatile choice for general-purpose microscopy. It works well with most inverted and upright microscopes equipped with standard 10x eyepieces or digital cameras.

4. **Durability and Build Quality** Zeiss objectives are built to last, with robust mechanical construction and precise alignment. The EC Plan-Neofluar series is particularly well-regarded for its longevity, even with frequent use.

5. **Wide Field of View** The 10x magnification provides a broad field of view, making it ideal for observing larger samples or surveying tissue sections without excessive magnification.

6. **Compatibility with Phase Contrast** While not a phase-contrast objective, it can be used effectively with phase-contrast condensers (if the microscope is configured for it), enhancing contrast for transparent or unstained samples.

7. **Resale and Replacement Value** Zeiss objectives retain their value well, and this model is a standard in many research and clinical labs, making it easier to find replacements or upgrades if needed.

8. **Minimal Maintenance Requirements** Unlike some lower-quality objectives, this one does not require frequent cleaning or adjustment, reducing downtime in a lab setting.

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#### **Cons**

1. **High Cost** Zeiss objectives are premium-priced, and this 10x EC Plan-Neofluar is no exception. For basic microscopy needs, lower-cost alternatives (e.g., from Nikon, Olympus, or even third-party brands) may offer similar performance at a fraction of the price.

2. **Overkill for Basic Use** If you are only performing simple, low-magnification observations (e.g., general histology or cell culture checks), a less expensive objective (e.g., a 10x Plan Apochromat or Achromat) may suffice without sacrificing image quality.

3. **Limited Numerical Aperture** The 0.3 NA is relatively low, meaning it is not optimized for high-resolution imaging of fine details. For detailed cellular or subcellular work, higher-NA objectives (e.g., 20x, 40x, or 60x) would be more appropriate.

4. **Specialized Mounting Requirements** Zeiss objectives often require precise mounting on microscopes with compatible nosepieces. If your microscope has an older or non-standard design, compatibility may be an issue.

5. **Potential for Overuse of Magnification** Some users may be tempted to rely too heavily on 10x magnification, leading to unnecessary strain on the eyes or poor focus when switching to higher magnifications. A balanced setup with higher-NA objectives is often better for detailed work.

6. **Weight and Bulk** Zeiss objectives are heavier than some alternatives, which may affect the balance of the microscope nosepiece, especially if multiple objectives are used.

7. **Limited Availability of Replacement Parts** While rare, if the objective requires servicing, finding replacement parts or authorized repair services may be more difficult or expensive than for more common brands.

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### **Conclusion**

The **Zeiss EC Plan-Neofluar 10x/0.3** is an excellent choice if you prioritize **optical precision, durability, and long-term reliability** in a general-purpose microscope objective. Its corrected optics and compatibility with advanced microscopy techniques make it a strong investment for labs that require consistent, high-quality imaging. However, for **budget-conscious users or those with basic microscopy needs**, a lower-cost alternative may provide adequate performance without the premium price.

If your primary use involves **routine tissue observation, cell culture checks, or general histology**, this objective is a **solid, high-end option** that will serve you well for years. If you anticipate **frequent high-resolution work (e.g., detailed cellular imaging)**, pairing it with higher-NA objectives (e.g., 20x, 40x) would be more practical.

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### **Recommendation**

- You are working in a **research, clinical, or high-demand lab** where image quality and longevity are critical.

- Your budget allows for a **premium objective** that will not need frequent replacement.

- You plan to use it with **advanced techniques** (e.g., phase contrast, fluorescence with appropriate filters) where corrected optics matter.

- You value **brand reputation and resale value** for future upgrades.

- You are on a **tight budget** and can achieve similar results with a **Nikon Plan Fluor, Olympus UPlanFL, or third-party objective** (e.g., from Thorlabs or Motic).

- Your microscopy needs are **primarily low-magnification and non-critical** (e.g., teaching labs, basic cell culture).

- You require **higher NA objectives** for detailed work, in which case investing in a **20x or 40x Zeiss objective** alongside this one may be more cost-effective long-term.

For most **serious microscopists**, the **Zeiss EC Plan-Neofluar 10x/0.3** is a **worthy investment** that justifies its cost through superior performance and durability. However, if cost is a major concern, carefully evaluate whether the **optical improvements** over cheaper alternatives are necessary for your specific applications.

Details:

Includes the following microscope objective: 1 - ZEISS EC PLAN-NEOFLUAR 10X / 0.3 /-, This may need to be cleaned. I'm not a microscope dealer or expert. I looked at the lens with an eyepiece and did not see any lamination, cracks or scratches on.

part #: 4403309901 price

• $200.00

specifications microscopepartzo:

• brand: Zeiss
• mpn: 440330-9901
• model: 440330-9901 10x/0.3
• country of origin: Germany
• intended use/discipline: Biological Laboratory, Medical Laboratory

seller microscopepartzo:

• city: Mechanicsville, Virginia
• rating: 100.0%
• # reviews: 2627

payments microscopepartzo:

• other
• wallet: Paypal
• credit card: Diners-club

general microscopepartzo:

• Medical/Lab Equipment Attachments Accessories > Microscope Parts Accessories > Other Microscope Parts Accessories
• condition: Used

offer microscopepartzo:

• availability: In Stock
• sold: 0
• quantity: 1
• options: Ship-to-home
• started: March 16, 2026

shipping microscopepartzo:

• type: Calculated
• transit: 3-8 Days
• class: Standard, Expedited
• cost: $8.22
• carrier: USPS
• service: USPS Ground Advantage, USPS Priority Mail

returns microscopepartzo:

• policy: No Returns

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