OLYMPUS 9-U591 Microscope Frosted Filter Slider U-FR-2

( Brand: Olympus ), ( Manufacturer Part Number: 9-U591 ), ( Part Type: Filter ), ( Country Of Origin: Japan )

Review OLYMPUS Microscope Frosted Filter Slider

The **Olympus U-U591 Microscope U-FR2 Frosted Filter Slider** is a precision-engineered accessory designed to enhance the versatility and clarity of Olympus inverted and upright microscopes, particularly those equipped with fluorescence and brightfield imaging capabilities. This high-quality frosted glass filter slider is engineered to seamlessly integrate into the U-U591 filter turret system, offering researchers, biologists, and medical professionals a reliable method to adjust light intensity and reduce glare during microscopic observations. Crafted from durable, optically flat frosted glass, the U-FR2 filter provides a diffuse, even distribution of light, minimizing harsh reflections and improving contrast in both transmitted and incident illumination setups. Its frosted surface eliminates the need for additional neutral density filters while maintaining consistent light diffusion, making it an ideal choice for applications requiring precise control over illumination without compromising image quality. The filter slider s robust construction ensures long-term stability and resistance to scratching, ensuring consistent performance across extended use in laboratory environments. Whether used in cell culture analysis, histological studies, or fluorescence microscopy, the U-FR2 enhances the overall imaging experience by delivering a softer, more controlled light source that reduces eye strain and improves visual acuity. Its compatibility with the U-U591 filter turret system further solidifies its role as a versatile accessory for Olympus microscopes, catering to both routine and specialized imaging needs with professional-grade reliability.

### **Pros and Cons of buying a Olympus U-Series U591 Microscope with U-FR2 (Frosted Filter Slider)**

#### **Pros**

1. **High-Quality Optical Performance**

The Olympus U591 is a well-regarded microscope known for its sharp, high-contrast imaging, particularly with brightfield and phase-contrast techniques. Its achromatic optics deliver clear and accurate observations, making it suitable for educational and basic research applications.

2. **Durable and Reliable Construction**

Olympus microscopes are built with sturdy metal components, ensuring longevity and resistance to wear. The U591 s mechanical stage and coarse/fine focus knobs are designed for precision, reducing the risk of slippage or misalignment during use.

3. **Versatile Illumination Options**

The microscope includes a built-in halogen light source, which provides consistent illumination. The inclusion of the **U-FR2 frosted filter slider** allows for adjustable contrast and brightness, enhancing visibility of specimens. This is particularly useful for observing transparent or lightly stained samples.

4. **User-Friendly Design**

The U591 features a straightforward layout with intuitive controls, making it accessible for students, lab technicians, and beginners. The ergonomic eyepieces and adjustable interocular distance reduce eye strain during extended use.

5. **Compatibility with Additional Accessories**

Olympus s U-series is modular, allowing for future upgrades such as higher-magnification objectives, cameras, or specialized illumination systems (e.g., fluorescence or darkfield). This makes the microscope adaptable to evolving research or educational needs.

6. **Good Value for Educational and Entry-Level Research**

Compared to higher-end microscopes, the U591 offers excellent performance at a relatively affordable price, making it a practical choice for schools, small labs, or individual researchers on a budget.

7. **Compact and Space-Efficient**

The microscope s design is relatively compact, making it easy to store and transport if needed. This is advantageous for shared lab spaces or mobile fieldwork applications.

---

#### **Cons**

1. **Limited Magnification Range**

The U591 typically comes with lower-magnification objectives (e.g., 4x, 10x, 40x), which may not be sufficient for highly detailed or high-resolution work. Users requiring higher magnification (e.g., 100x oil immersion) may need to purchase additional objectives separately, increasing the total cost.

2. **Basic Mechanical Stage**

While functional, the stage lacks advanced features such as mechanical stage controls or automated focusing, which are present in more expensive models. This can be cumbersome for precise sample manipulation or automated imaging tasks.

3. **No Built-In Camera Port**

The U591 does not include a trinocular head or a camera port by default, meaning users must purchase a separate camera adapter or trinocular eyepiece if they want to capture images or videos. This adds to the overall expense and complexity.

4. **Halogen Light Source Limitations**

While the halogen bulb provides adequate illumination, it is not as energy-efficient or long-lasting as LED or other modern light sources. Users may need to replace the bulb periodically, adding maintenance costs.

5. **Frosted Filter Slider Utility**

The **U-FR2 frosted filter slider** is useful for adjusting contrast, but it is not as precise or versatile as more advanced filters (e.g., polarizing or interference filters). For specialized imaging techniques, additional filters may still be required.

6. **Potential for Wear Over Time**

Like many mechanical microscopes, prolonged use can lead to slight misalignments or wear on the focus knobs or stage. Regular maintenance is necessary to keep the microscope performing optimally.

7. **Limited Warranty Support**

Olympus s warranty coverage for basic models like the U591 may be shorter or less comprehensive than that of high-end research-grade microscopes. Users should verify warranty terms before purchase.

---

### **Ending Conclusion**

The **Olympus U591 microscope with U-FR2 frosted filter slider** is an excellent choice for **educational settings, entry-level research, or general laboratory use** where cost-effectiveness and reliable performance are prioritized. Its high-quality optics, durable construction, and versatile illumination make it a practical tool for basic microscopy tasks. However, its limitations in magnification, lack of advanced features, and need for additional accessories for imaging or high-resolution work may not suffice for advanced research or professional applications.

If your primary needs align with **teaching, routine sample observation, or budget-conscious purchasing**, the U591 is a strong recommendation. For users requiring **higher magnification, automated functions, or advanced imaging capabilities**, investing in a more specialized or higher-end microscope may be warranted.

### **Recommendation**

- You are a student, educator, or lab technician needing a reliable, affordable microscope for general use.

- Your work involves brightfield or phase-contrast imaging without requiring high magnification.

- You plan to supplement it with additional objectives or accessories (e.g., a camera) in the future.

- You require **higher magnification (e.g., 100x oil immersion)** or specialized imaging techniques (e.g., fluorescence, DIC).

- You need **automated focusing, digital imaging, or advanced stage controls**.

- Your budget allows for a more premium microscope (e.g., Olympus BX series, Nikon Eclipse, or Leica DM models) that offers superior durability and features.

Details:

This product is offered by Microscope Marketplace, a Monday Scientific Company. Olympus Microscope U-FR-2 Frosted Filter Slider, is in good condition.

part #: 9u591 prices

• $50.00-$65.00

specifications microscopepartzo:

• brand: Olympus
• mpn: 9-u591
• part type: Filter
• country of origin: Japan

returns microscopepartzo:

• policy: Returns Accepted
• paid by: Buyer
• method: Money back
• time: 14 Days

seller microscopepartzo:

• city: Sanford, North Carolina
• rating: 100.0%
• # reviews: 4325

shipping microscopepartzo:

• class: Standard
• transit: 3-9 Days
• service: USPS Ground Advantage
• carrier: USPS
• cost: $8.00
• type: Fixed

payments microscopepartzo:

• wallet: Apple-pay
• credit card: Mastercard
• other

offer microscopepartzo:

• availability: In Stock
• quantity: 1
• sold: 0
• options: Ship-to-home
• started: April 8, 2026
• best offers: True

general microscopepartzo:

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

Olympus 9-U591 Is Similar To:

• Fn22 Uis2 Tirf 60x Microscope 1.49 0.13-0.19 Apo Olympus Objective (30% similar) Mechanically and optically in excellent condition. Small cosmetic dent on metal housing see last photo but this has no affect on function. RMS threads. Beautiful piece. 14 day money back guarantee if you're not satisfied for any reason...(February 17th, 2015)
• Olympus Optics Objective Microscope 75x 0.75x Vm 0 Stereo (46.8% similar) Olympus objective. Used but in great condition...(February 16th, 2015)
• 001270 Olympus Microscope Objective Set (53.8% similar) The unit appears in good condition with no apparent scratches. Device was acquired with other surplus equipment. No documentation available...(April 17th, 2017)
• 00a J71510-1 Dv3385-00 Olympus Arcturus Microscope Power Distribution Circuit Board Pcb (38.3% similar) I combine shipping where practical. They are not included in the items sale price or shipping cost. 95 only what is described as included or shown in the photos. Sorry, no local pick-up for this item. Power control PCB removed from an Olympus IX50 Arcturus pix cell ii - PXL-200 microscope model: Si-...(January 29th, 2019)
• 044550 Olympus Microscope Bh Dual Observation Attachment (45.5% similar) Olympus microscope bah BH2 dual observation attachment w 9B2652 physical condition: this unit has some minor scuffing on casing from average use. Unit looks to be in great condition. Lens look clean...(June 15th, 2018)
• Adapter 0.5x Leica 1.0xlens Leitz Microscope 3 2 Camera Iso38 Olympus Nikon M4 (33.3% similar) Assembly pieces minus. The adapter uses a standard ISO 38MM x c mount LTZ Leila wild ISO 38. The device is designed to insert into any microscope which contains a 38MM photo port bottom lower portion of picture. 0x port adapter see picture below for separate parts. 0x with f mount. 54 5, 31, 6, 49 ...(February 13th, 2015)
• 1-25p-ahlx-4 Arcturus Labs Iphone Microscope Adapter For Photoport Leitz Nikon Olympus (31.4% similar) They clamp on to the viewing ocular but this prevents microscope from being used with your camera in position these inclined oculars. This one unit is for the iPhone 4 or 4S. Be sure it is 1x without an optic. Also works on microscopes usually inverted type with side camera ports and 1x c-mount ...(April 30th, 2018)
• Cx Planapo Microscope Olympus 1.25x Bx Infinity Series Ix Objective 04 (30.4% similar) Made for Olympus bx, CZ and ix series microscope model's, also usable with other infinity corrected microscope brands with standard RMS threads from Nikon, LTZ, Leila or Zeus's. 04STANDARD RMS thread achromatic lenses provide the highest possible color correction, sharpness, resolution and numerical...(January 1st, 2015)
• 160 A100po 1.30oil Olympus Objective 0.17 Microscope (37.7% similar) In an excellent cosmetic and optical condition. 30OIL microscope objective. See pictures for details. Olympus A100PO sold as is...(January 3rd, 2015)
• Objective 100x Microscope 160 Olympus 0.17 1.3na Dplanapo Uv (33.3% similar) This objective fits Olympus bah series microscopes or any other microscope or optical system with RMS thread and 160MM tube length . The objective has an internal iris diaphragm, which moves smoothly. 17MM cover glass thickness. The objective is used, but in very good condition. The body is clean ...(January 20th, 2015)
• 1-lb190 Olympus Microscope Objective Lens (48.4% similar) Brand new Olympus ea 100 objectives shipped with case...(June 30th, 2017)