K-F CONCEPT KF01.2492 Square Stops Filter Cinema Neutral 4FTFT 5.65FTFT ND1.8 Density Comp

( Brand: K-f Concept ), ( Manufacturer Part Number: KF01.2492 ), ( Part Type: Filter ), ( Photo Filter Effect Type: Neutral Density ), ( Photo Filter Factor: 128.0 ), ( Style: Nd1.8 ), ( Photo Filter Thread Size: 4.0 ), ( Coating Description: Multi Coating ), ( Material: Optical Glass ), ( Package Dimensions Lxwxh: 7.64x5.71x1.14 Inches ), ( Weight: 0.79 Pounds )

Review K F CONCEPT 4ftft 5.65ftft Square Stops Filter Cinema Neutral Density Comp

The **K&F Concept ND1.8 4-Stop Square Cinema Neutral Density Filter (KF01.2492, 4" x 5.65" format)** is a high-performance, professional-grade neutral density filter designed specifically for cinematographers, videographers, and filmmakers seeking precise control over exposure in challenging lighting conditions. Engineered with a **square 4" x 5.65" form factor**, this filter is built to fit seamlessly into most modern cinema lenses, including those with matte boxes, while maintaining a clean, unobstructed viewfinder experience. Crafted from **optically superior, scratch-resistant glass** with a durable **black matte finish**, the filter ensures minimal light leakage and distortion, delivering consistent, neutral gray density across the entire visible spectrum without altering color balance. With an **ND1.8 (4-stop) attenuation**, it effectively reduces incoming light by **90%**, allowing for slower shutter speeds, shallower depth of field, or wider apertures in bright environments ideal for outdoor shoots, high-contrast scenes, or situations where natural light dominates. The filter s **square shape** eliminates the need for additional adapters, making it a versatile choice for both handheld and mounted setups, while its **compact size** ensures compatibility with a wide range of lenses without compromising image quality. Whether used to achieve cinematic bokeh, simulate low-light conditions, or simply balance exposure in daylight, this ND filter exemplifies precision engineering and optical clarity, making it an indispensable tool for professionals demanding flawless results in every frame.

### **Pros and Cons of buying a K&F Concept 5.65-Stop Square ND1.8 Filter (KF01.2492)**

1. **High Neutral Density (ND) Stopping Power** The 5.65-stop ND filter allows for long exposure photography in bright daylight without overexposing the image. This is ideal for smooth water effects, light trails, and cinematic slow-motion shots.

2. **Square Format for Versatility** Unlike circular ND filters, the square format can be used with any lens (no vignetting) and is compatible with most filter holders, including screw-in adapters for lenses without filter threads.

3. **High-Quality Optics** K&F Concept is known for producing filters with minimal color cast and sharp, clear images. The ND1.8 (neutral density) ensures consistent light reduction without altering color balance.

4. **Durable Construction** Made with multi-coated glass and a sturdy metal frame, this filter is resistant to scratches and moisture, making it suitable for professional use.

5. **Cinematic Applications** Perfect for filmmakers and photographers working in controlled lighting environments, such as studio setups or outdoor shoots where exposure control is critical.

6. **Easy to Mount** The square design fits standard filter holders, and the filter can be attached to a lens via a step-up ring if needed.

7. **Affordable for Professional Use** Compared to high-end brands like Lee or Formatt-Hitech, this filter offers strong performance at a lower cost.

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1. **Potential Vignetting with Some Lenses** While square filters avoid vignetting in most cases, some wide-angle lenses may still experience slight edge darkening if the filter is not perfectly centered.

2. **Requires a Filter Holder** Unlike screw-in ND filters, this square filter needs a holder, which adds bulk and cost if you don t already own one.

3. **Limited Polarizing Functionality** This is a pure ND filter, not a polarizer. If you need both effects, you would need to purchase a separate polarizing filter.

4. **Weight and Bulk** The metal frame adds weight, which may be noticeable when using long telephoto lenses or during extended shoots.

5. **Compatibility Issues with Some Mounts** If your filter holder is not universal, you may need adapters, which could complicate setup.

6. **Potential for Ghosting or Flare** Like all glass filters, this one can introduce ghosting or flare in extreme backlighting conditions, though high-quality coatings help mitigate this.

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### **Conclusion**

The **K&F Concept 5.65-Stop Square ND1.8 Filter** is an excellent choice for photographers and filmmakers who need precise exposure control in bright conditions. Its square format eliminates vignetting, making it more versatile than circular filters, and its high ND rating allows for creative long-exposure effects. The filter s durability and affordability further enhance its appeal, especially for professionals who require reliable gear without breaking the bank.

However, if you frequently shoot with wide-angle lenses or need polarizing effects, you may need additional accessories. Additionally, the need for a filter holder could be a minor inconvenience for those who prefer screw-in filters.

### **Recommendation**

- You prioritize long-exposure photography or cinematic slow-motion shots.

- You work with a variety of lenses and want to avoid vignetting.

- You need a high-quality, affordable ND filter for professional use.

- You already own or plan to purchase a filter holder.

- You frequently shoot with wide-angle lenses and are concerned about edge darkening.

- You need polarizing effects and want a single filter that combines ND and polarizing properties.

- You prefer screw-in filters for simplicity and portability.

Overall, this filter is a strong value for its performance and versatility, making it a solid recommendation for serious photographers and filmmakers.

Details:

Source: Euro monitor, 2024 data.

part #: kf012492 prices

• $29.99-$83.99

specifications filtecam:

• brand: K-f Concept
• mpn: Kf01.2492
• part type: Filter
• photo filter effect type: Neutral Density
• photo filter factor: 128.0
• style: Nd1.8
• photo filter thread size: 4.0
• coating description: Multi Coating
• material: Optical Glass
• package dimensions lxwxh: 7.64x5.71x1.14 Inches
• weight: 0.79 Pounds

payments filtecam:

• credit card: Mastercard
• wallet: Paypal
• other

shipping filtecam:

• cost: $0.00
• transit: 4-8 Days
• type: Fixed
• service: Economy
• class: Economy

returns filtecam:

• policy: No Returns

seller filtecam:

• city: Eugene, Oregon
• # reviews: 721
• rating: 100.0%

general filtecam:

• Cameras Photo > Lenses Filters > Filters
• condition: New

offer filtecam:

• quantity: 1
• options: Ship-to-home
• sold: 0
• availability: In Stock
• started: March 12, 2026

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