K-F CONCEPT KF01.2448 Square Stops Filter Cinema Neutral 4FTFT 5.65FTFT ND0.9 Density Comp

( Brand: K-f Concept ), ( Manufacturer Part Number: KF01.2448 ), ( Part Type: Filter ), ( Photo Filter Effect Type: Neutral Density ), ( Photo Filter Factor: 2.0 ), ( Style: Nd0.9 ), ( Photo Filter Size: 7.07 ), ( Photo Filter Thread Size: 4.0 ), ( Coating Description: Multi Coating ), ( Material: Optical Glass ), ( Package Dimensions Lxwxh: 7.64x5.75x1.14 Inches ), ( Weight: 0.77 Pounds )

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

The **K&F Concept KF01.2448 4x4 Foot Square Neutral Density (ND) Filter (ND0.9, 0.9 Stop)** is a high-quality, professional-grade cinematic filter designed to seamlessly integrate into large-format filmmaking setups, offering unparalleled control over exposure while maintaining pristine image integrity. Crafted from premium optical-grade glass, this 4-foot by 4-foot square filter is engineered to deliver consistent, neutral density without introducing color casts or distortion, making it an essential tool for cinematographers working with high-end cameras, drones, or large-format lenses. With an **ND0.9 rating (0.9 stop)**, this filter provides a subtle yet effective reduction in light transmission, allowing for slower shutter speeds, wider apertures, or extended exposure times without compromising sharpness or dynamic range ideal for achieving cinematic bokeh, smooth motion blur, or low-light shooting in demanding environments. Its **square format (4ft x 4ft)** ensures compatibility with a wide range of camera mounts, including large sensor rigs, drone payloads, and professional video cameras, while its **neutral density** ensures no alteration to the original color palette, preserving the director s vision. Whether used to simulate natural daylight in controlled studio settings, extend creative exposure techniques in outdoor shoots, or mitigate harsh lighting conditions in high-contrast environments, this filter exemplifies precision engineering and optical clarity. Built to withstand rigorous use, the KF01.2448 is constructed with durable, scratch-resistant coatings and reinforced edges, ensuring longevity and reliability across diverse production scenarios. For cinematographers seeking a versatile, high-performance solution to master exposure with finesse, this neutral density filter represents a cornerstone of modern filmmaking toolkit blending technical excellence with artistic flexibility.

### **Pros and Cons of buying a K&F Concept 5.65-Stop Square Neutral Density (ND) Filter (KF01.2448, 4" x 4", ND0.9)**

1. **High Neutral Density (ND0.9) Ideal for Long Exposures**

- Blocks **5.65 stops** of light, allowing for slow shutter speeds in bright conditions (e.g., waterfalls, cityscapes, light trails).

- Enables creative effects like smooth motion blur without increasing ISO or opening the aperture excessively.

2. **Square Format (4" x 4") Versatile Compatibility**

- Fits most **full-frame and APS-C cameras** with adapters (e.g., Rosco or B W step-down rings).

- Works with **square and rectangular filter holders**, offering flexibility for different setups.

3. **Cinema-Grade Quality Minimal Color Cast**

- Designed for professional use, with **neutral density** (no color shift) to preserve accurate white balance.

- Better than some consumer-grade ND filters that introduce tint or haze.

4. **Durable Construction Glass-Based (Not Gel)**

- Made from **optical glass**, reducing reflections and maintaining image clarity.

- More resistant to scratches and warping compared to plastic or gel-based filters.

5. **Easy to Mount Standard Threading**

- Uses **4" x 4" square threading**, compatible with most filter systems (e.g., Cokin, Lee, or third-party holders).

- No need for custom adapters if you already have a 4" system.

6. **Cost-Effective for Professional Use**

- Priced reasonably for a **high-quality ND filter**, making it a good alternative to branded options like Lee or Singh-Ray.

- Often sold in bundles with other filters, offering better value.

7. **Reduces Lens Flare**

- Helps mitigate lens flare in bright sunlight by reducing the amount of light entering the lens.

---

1. **Square Format May Require Adapters**

- If your camera uses **circular filters (e.g., Canon EF, Nikon F)**, you ll need **step-down rings** (e.g., 4" to 82mm), adding extra cost.

- Some filter holders (especially budget ones) may not fit perfectly, leading to potential vignetting.

2. **Potential Vignetting with Certain Lenses**

- If the filter holder isn t perfectly aligned or the lens has a wide aperture, **dark corners** may appear in shots.

- Requires careful mounting to avoid this issue.

3. **Not Weather-Sealed**

- Unlike some professional cinema filters, this is a **basic optical glass ND** and may not be fully sealed against moisture or dust.

- Not ideal for extreme outdoor conditions without additional protection.

4. **Limited to 4" x 4" Size**

- If you shoot with **ultra-wide lenses (e.g., 15mm or fisheye)**, a larger filter (e.g., 6" x 6") might be more practical to avoid vignetting.

- Some photographers prefer **circular filters** for easier handling with prime lenses.

5. **No Built-in Polarizer or Gradient Options**

- This is a **pure ND filter** you ll need separate **polarizers or graduated ND filters** for additional effects.

- If you want all-in-one solutions, you may need to buy multiple filters.

6. **Potential for Ghosting or Ghosting Artifacts (Rare but Possible)**

- Some glass-based ND filters can cause **ghosting** (double images) in high-contrast scenes, though this is uncommon with well-made filters like K&F Concept s.

7. **Not Ideal for Video (Compared to Cinema-Specific NDs)**

- While usable for video, **cinema-grade ND filters** (e.g., from Lee or Singh-Ray) are often preferred for **consistent color accuracy and lower flare** in filmmaking.

---

The **K&F Concept 5.65-Stop Square ND Filter (ND0.9)** is a **solid choice** for photographers and videographers who need a **high-quality, affordable ND filter** for long exposures, cityscapes, or low-light creative shots. Its **neutral density, durability, and compatibility with most filter systems** make it a practical option, especially for those already using **4" square filters**.

However, if you **shoot with circular filters, ultra-wide lenses, or prioritize video work**, you may need to consider **alternatives like Lee Filters, Singh-Ray, or B W**. Additionally, if you frequently shoot in **harsh weather conditions**, a **weather-sealed or cinema-specific ND** might be more reliable.

- You use **square filter systems** (e.g., Cokin, Lee) and need a **reliable 5.65-stop ND**.

- You shoot **landscapes, long exposures, or low-light scenes** where ND is essential.

- You want a **cost-effective professional-grade option** without sacrificing quality.

- You use **circular filters** and need **step-down rings** (which may add cost).

- You shoot **video frequently** and want **cinema-specific ND filters** for better color accuracy.

- You use **ultra-wide lenses** and prefer **larger filter sizes** (e.g., 6" x 6") to avoid vignetting.

- You need **polarizing or gradient ND functions** in one filter.

**Final Verdict:** This is a **great mid-range ND filter** for photographers who prioritize **neutral density without breaking the bank**. For videographers or those needing extreme versatility, higher-end brands may be worth the investment.

Details:

Source: Euro monitor, 2024 data.

part #: kf012448 prices

• $47.07-$160.00

specifications filtecam:

• brand: K-f Concept
• mpn: Kf01.2448
• part type: Filter
• photo filter effect type: Neutral Density
• photo filter factor: 2.0
• style: Nd0.9
• photo filter size: 7.07
• photo filter thread size: 4.0
• coating description: Multi Coating
• material: Optical Glass
• package dimensions lxwxh: 7.64x5.75x1.14 Inches
• weight: 0.77 Pounds

offer filtecam:

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

payments filtecam:

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

returns filtecam:

• policy: No Returns

seller filtecam:

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

shipping filtecam:

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

general filtecam:

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

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