1066391 Mrc Nano Pro Polarizer Ksm Cpl Filter Box 49MM

( Brand: B-w ), ( Manufacturer Part Number: 1066391 ), ( Part Type: Circular Filter Box ), ( Filter Effects: Polarizer ), ( Filter Size: 49 Mm ), ( Filter Shape: Circular ), ( Mount Fitting: Threaded ), ( Country Of Origin: Germany )

Review B W 49mm Mrc Nano Xs pro Circular Polarizer Ksm Cpl Filter New Open Box

The **K&F Concept 49mm MRC Nano XS-Pro Polarizer (Product Code: 1066391)** is a high-performance, ultra-compact circular polarizing filter designed for photographers seeking precision, versatility, and minimal bulk without compromising on optical quality. Engineered with **Multi Resonance Coating (MRC) technology**, this polarizer delivers exceptional clarity, contrast, and color fidelity by reducing ghosting, flare, and internal reflections common issues that plague cheaper alternatives. The **Nano XS-Pro series** stands out with its **ultra-thin profile**, measuring just **11mm in thickness**, making it one of the slimmest circular polarizers on the market. This compact design is ideal for photographers using telephoto lenses, macro setups, or those who prioritize a streamlined rig without sacrificing functionality.

Crafted from **high-grade optical glass**, the filter maintains a **99.9% light transmission rate**, ensuring minimal loss of exposure while maximizing dynamic range. The **KSM (K&F Smart Mount) system** allows for quick and secure attachment to any standard 49mm lens, with a **screw-in design** that eliminates the need for additional adapters or bulky filter holders. This system also features a **low-profile, non-reflective black coating** on the mounting surface, reducing lens flare and maintaining a clean, professional look. The **circular polarizing effect** is smooth and consistent across the entire frame, providing photographers with precise control over glare reduction, sky enhancement, and subject isolation whether shooting landscapes, portraits, or architectural photography.

Built to withstand the demands of professional use, the **Nano XS-Pro Polarizer** is constructed from **durable, weather-sealed materials**, making it resistant to moisture, dust, and minor impacts. The **anti-reflective coating** on both surfaces further enhances image sharpness by minimizing lens reflections, while the **precision-machined threads** ensure a secure, wobble-free fit. Weighing just **120 grams**, this filter is an excellent choice for travel photographers, videographers, or anyone who values portability without sacrificing performance. Whether used alone or stacked with other filters in a **K&F Concept filter box**, the **1066391** delivers professional-grade results in a compact, reliable package proving that exceptional optics don t have to come at the cost of convenience.

### **Pros and Cons of the 1066391 49mm MRC Nano XS-Pro Polarizer (KSM CPL Filter Box)**

1. **High-Quality Polarization** The MRC Nano XS-Pro is known for its superior polarization performance, effectively reducing glare and reflections while maintaining image clarity. The KSM (Kodak Super Master) coating ensures consistent color accuracy and minimal light loss.

2. **Compact and Lightweight Design** The "XS-Pro" designation indicates a slim profile, making it easier to carry in a lens hood or filter box compared to bulkier polarizers. This is particularly useful for travel and street photography.

3. **Low Reflection and Ghosting** The Nano coating reduces internal reflections and ghosting, which is critical for high-contrast scenes and backlit subjects. This helps maintain image purity without unwanted artifacts.

4. **Durable Construction** MRC filters are built with high-quality glass and robust metal or resin frames, ensuring longevity even with frequent use. The filter box provides additional protection during transport.

5. **Versatile Mounting** The 49mm size is compatible with a wide range of lenses, and the filter box allows for easy attachment and detachment without losing the polarizer.

6. **Minimal Light Loss** Unlike some polarizers that significantly darken images, the Nano XS-Pro maintains good light transmission, making it suitable for low-light conditions.

7. **Brand Reputation** MRC is a well-regarded brand in the photography community, known for producing high-performance filters with reliable build quality.

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1. **Price** MRC filters are premium products, and this polarizer is no exception. The cost may be prohibitive for casual photographers or those on a tight budget.

2. **Limited Color Rendering in Extreme Angles** While the KSM coating minimizes color shifts, some polarizers can still introduce slight color casts when rotated to extreme angles. Testing in different lighting conditions is recommended.

3. **Not Ideal for Wide-Angle Lenses** The slim profile of the Nano XS-Pro may not be optimal for very wide-angle lenses (e.g., ultra-wide fisheye or 14mm 24mm zooms), where vignetting or edge darkening can occur. A full-frame polarizer might be a better choice for such lenses.

4. **Filter Box Dependency** The filter is sold in a box, which is convenient for transport but may not be as secure as a dedicated lens hood or filter holder for some photographers. The box adds slight bulk compared to a standalone polarizer.

5. **Potential for Scratches** Like all glass filters, this one is susceptible to scratches if mishandled. While MRC provides a protective coating, care must still be taken during cleaning and storage.

6. **No UV Protection** This is a polarizer, not a UV filter. If you also need UV protection, you ll need to stack it with another filter, which could introduce additional reflections or vignetting.

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The **1066391 49mm MRC Nano XS-Pro Polarizer (KSM CPL Filter Box)** is an excellent choice for photographers who prioritize image quality, durability, and compactness. Its advanced polarization, low reflection properties, and slim design make it ideal for landscape, travel, and general photography where glare reduction is essential. However, its premium price and potential limitations with wide-angle lenses or extreme color shifts at certain angles should be considered.

For **serious photographers** who frequently shoot in bright, reflective conditions and value high-performance filters, this polarizer is highly recommended. For **budget-conscious or casual photographers**, a more affordable polarizer (e.g., from B W or Lee) might suffice, though they may lack some of the advanced features of the MRC Nano XS-Pro.

If you re investing in a high-quality polarizer and need a reliable, compact solution for your 49mm lenses, the **MRC Nano XS-Pro is an outstanding choice**. Pair it with a sturdy lens hood to further reduce flare and ensure longevity. If you frequently shoot with wide-angle lenses, consider testing it on your specific lens to check for vignetting. Overall, it s a filter that delivers professional results and justifies its cost for those who demand the best.

Details:

Made in Germany. Please review photos carefully for box condition. Circular polarizer CPL. Never installed or put into service.

Filter is new / never used. MRC Nano multi-resistant coating. B W 49mm MRC Nano XS-Pro Circular Polarizer KSM Filter New / Unused. Outer retail box shows wear from storage / handling.

XS-Pro slim mount. Offered here is a B W 49mm MRC Nano XS-Pro Circular Polarizer filter, premium German-made filter known for excellent optical quality and durability. A great premium filter for reducing reflections, improving contrast, and enhancing skies outdoor photography.

part #: 1066391 prices

• $22.94-$79.00

specifications filtecam:

• brand: B-w
• mpn: 1066391
• part type: Circular Filter Box
• filter effects: Polarizer
• filter size: 49 Mm
• filter shape: Circular
• mount fitting: Threaded
• country of origin: Germany

payments filtecam:

• credit card: Visa
• other
• wallet: Google-pay

offer filtecam:

• options: Ship-to-home
• quantity: 1
• started: April 5, 2026
• sold: 0
• best offers: True
• availability: In Stock

returns filtecam:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days
• method: Money back

shipping filtecam:

• cost: $5.62
• class: Standard
• type: Calculated
• service: USPS Ground Advantage
• transit: 4-8 Days
• carrier: USPS

seller filtecam:

• city: Hightstown, New Jersey
• # reviews: 1016
• rating: 100.0%

general filtecam:

• Cameras Photo > Lenses Filters > Filters
• condition: Open box

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