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  3. BAUSCH LOMB TK5361

BAUSCH LOMB TK5361 Microscope Objective Lens BL6250 10X 43X

Bl6250 Bausch & Lomb Tk5361 2 Vintage And Microscope Objective Lens 10x 43x

( Brand: Bausch Lomb ), ( Manufacturer Part Number: TK5361 ), ( Model: 10X BL6250 ), ( Part Type: Len ), ( Country Of Origin: United States ), ( Intended Use/discipline: Biological Laboratory )

Review BAUSCH LOMB Vintage And Microscope Objective Lens 10x 43x

The **Bausch Lomb TK5361 10x/0.25 NA Eyepiece (BL6250) with 43x Total Magnification** is a precision-engineered optical component designed to elevate the performance of compound microscopes, delivering exceptional clarity and contrast for both educational and professional applications. Crafted with meticulous attention to detail, this eyepiece features a **10x magnification** with a **0.25 numerical aperture (NA)**, ensuring broad field-of-view observation while maintaining sharp, high-contrast imagery. The **43x total magnification** (when paired with a standard 4x objective lens) makes it an ideal choice for general biological studies, cell culture analysis, or introductory microscopy tasks where versatility and accessibility are key. Constructed from high-quality optical glass, the lens elements are coated with advanced anti-reflective and anti-scratch layers to minimize glare, reduce chromatic aberrations, and prolong the lifespan of the component, even under frequent use. The **wide-field design** enhances peripheral vision, reducing eye strain during extended observation sessions, while the **ergonomic eyepiece tube** ensures comfortable alignment for users of varying eye positions. Whether integrated into a student microscope for classroom demonstrations or a research-grade instrument for routine laboratory work, this eyepiece excels in balancing affordability with performance, making complex microscopy more approachable without compromising on optical fidelity. Its compatibility with standard microscope bodies including those from Bausch Lomb s own TK series ensures seamless integration, while its durable construction and straightforward maintenance requirements make it a reliable staple for both novice and experienced microscopists.

### **Pros and Cons of buying a Bausch Lomb TK5361 Microscope Objective Lens (10x BL6250, 43x)**

#### **Pros:**

1. **Compatibility with Older Microscopes** The Bausch Lomb TK5361 is designed for traditional mechanical stage microscopes, making it a reliable choice for users with legacy setups. It fits the older **TK5361** series, which is still widely used in educational and basic laboratory settings.

2. **Affordable Alternative** Compared to modern high-end objectives, this lens is relatively inexpensive, making it a cost-effective option for budget-conscious buyers, particularly in educational or low-budget research environments.

3. **Durable and Simple Design** The lens appears to be built for longevity, with a robust mechanical construction that resists wear over time. It lacks advanced features like phase contrast or fluorescence, but this simplicity can be an advantage for basic light microscopy tasks.

4. **Wide Field of View (10x)** The **10x objective** provides a broad field of view, which is useful for observing larger specimens or scanning slides quickly. This is particularly beneficial in teaching settings where multiple students may be observing the same sample.

5. **Compatibility with Standard Slide Formats** The lens works with conventional glass slides, making it suitable for standard histological and biological examinations.

6. **Ease of Maintenance** Being a basic lens, cleaning and maintenance are straightforward, requiring only careful wiping with lens paper and mild cleaning solutions.

7. **Good for Basic Observations** If the primary use is general light microscopy (e.g., cell biology, botany, or introductory lab work), this lens performs adequately for its intended purpose.

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#### **Cons:**

1. **Lower Optical Quality Compared to Modern Lenses** The **43x magnification** (likely a typo; the correct designation is **430x total magnification when combined with a 10x eyepiece**) is relatively low for detailed work. Modern objectives offer higher resolution, better contrast, and sharper imaging, especially at higher magnifications. The **10x objective itself** may lack the precision of contemporary lenses, such as those from Olympus, Nikon, or Zeiss.

2. **Fixed Magnification (No Zoom)** Unlike modern zoom objectives, this lens provides a single fixed magnification, limiting flexibility in adjusting the field of view without changing lenses.

3. **Potential for Chromatic Aberration** Older lenses, particularly those from mid-century manufacturers like Bausch Lomb, may suffer from chromatic aberration (color fringing), reducing image clarity, especially at higher magnifications.

4. **Limited Working Distance** The working distance (the space between the lens and the slide) may be shorter than modern objectives, making it less forgiving when focusing on thick specimens or using cover slips.

5. **No Correction for Modern Slide Thicknesses** Contemporary slides often use thicker cover slips (e.g., 1.5 mm) compared to older standards. This lens may not be fully optimized for these thicker slides, leading to potential focusing issues.

6. **Lack of Advanced Features** The lens does not support phase contrast, differential interference contrast (DIC), or fluorescence, which are essential for advanced biological and medical research.

7. **Potential for Misalignment Issues** Older mechanical systems can develop misalignment over time, leading to inconsistent focusing or image distortion if not properly maintained.

8. **Limited Availability of Replacement Parts** Finding replacement parts or compatible adapters for this lens may be difficult, as modern microscope manufacturers have largely phased out support for legacy systems.

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### **Conclusion:**

The **Bausch Lomb TK5361 10x objective lens** is a **functional but outdated** choice for basic light microscopy. It remains useful in **educational settings, low-budget labs, or as a backup lens** for older microscopes where compatibility is a priority. However, for **modern research, detailed imaging, or high-resolution work**, it falls short compared to contemporary objectives.

If your primary need is **teaching, simple observations, or maintaining an older microscope setup**, this lens is a **practical and affordable** option. However, if you require **higher resolution, better contrast, or advanced imaging techniques**, investing in a **modern objective (e.g., from Olympus, Nikon, or Leica)** would be a more future-proof decision.

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### **Recommendation:** - **Buy the Bausch Lomb lens if:**

- You have an older microscope that requires this specific lens.

- You are working in an educational setting with limited budgets.

- You only need basic magnification for general observations.

- **Avoid or upgrade to a modern lens if:**

- You require high-resolution imaging (e.g., cell biology, histology, or medical diagnostics).

- You need advanced features like phase contrast or fluorescence.

- You plan to use the microscope for professional or research purposes where precision matters.

For most **modern applications**, a **new 10x objective from a reputable manufacturer** (e.g., Olympus SPlan, Nikon Plan Fluor) would be a better long-term investment despite the higher cost. However, if you are constrained by budget or legacy equipment, the Bausch Lomb lens remains a **viable stopgap solution**.

Details:

These lenses are a great addition to any microscope and compatible with variety of model's. These lenses were made in the USA and are perfect for use a biological laboratory setting. The brand of the lenses is Bausch Lomb, a well-known and respected name in field microscopy. Don't miss out on an opportunity to add these high-quality lenses your collection.

part #: tk5361 price

  • $24.80

specifications microscopepartzo:

  • brand: Bausch Lomb
  • mpn: Tk5361
  • model: 10x Bl6250
  • part type: Len
  • country of origin: United States
  • intended use/discipline: Biological Laboratory

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  • transit: 4-9 Days
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  • type: Fixed
  • class: Standard
  • cost: $8.00
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general microscopepartzo:

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

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seller microscopepartzo:

  • city: Falconer, New York
  • # reviews: 4994
  • rating: 99.9%

offer microscopepartzo:

  • availability: In Stock
  • quantity: 1
  • sold: 0
  • options: Ship-to-home
  • started: April 19, 2026
  • best offers: True
part type: len, country of origin: united states, intended use/discipline: biological laboratory,
category: business & industrial > medical/lab equipment attachments accessories > microscope parts accessories, sku: 12482993423211723,
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1 offer $24.80 USD
  • Used. Offer #1 priced at $24.80 + $8.00 shipping estimate = $32.80* total. Don't miss out on an opportunity to add these high-quality lenses to your collection. These lenses were made in the United States and are perfect for use in a biological laboratory setting.+$8.00 shipping

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