Thomas If you’re a photographer or videographer looking to control light without constantly swapping filters, the K&F Concept 67mm Variable ND2–ND400 offers an elegant, budget-friendly solution. Designed to block 1–9 stops of light, this adjustable ND filter gives you smooth control over exposure, motion blur, and depth of field — making it a staple for landscape shooters, filmmakers, and outdoor content creators. Concept 67mm Variable ND2–ND400.
In this detailed review, I’ll break down what makes the K&F Concept B-Series ND filter a go-to in the sub-$50 category, its strengths and limitations, and how it stacks up against higher-end options.
Concept 67mm Variable ND2–ND400
- 【Import Optical Glass】Crafted from premium AGC optical glass with 8 multi-layer coatings, this ND filter reduces reflect…
- 【Versatile Light Control】With 1 to 9 stops of adjustable light reduction and 360-degree rotation for precise dimming set…
- 【Glare-Free Surface】Treated with an oxidized sandblasting process, this filter prevents unwanted stray light and minimiz…
📸 Why I Chose This ND Filter
I needed a reliable variable ND filter that wouldn’t break the bank, especially for my mirrorless lens with a 67mm thread. My goals:
- Control shutter speed in bright daylight for video
- Capture long exposures of waterfalls and clouds
- Avoid carrying multiple fixed ND filters
The K&F Concept Variable ND checked all the boxes:
- ✅ Broad 1–9 stops light reduction (ND2 to ND400)
- ✅ Adjustable ring with clear markings
- ✅ High-quality optics for the price
- ✅ Comes with a microfiber cloth and protective case
📦 What’s in the Box?
- K&F Concept ND2–ND400 Filter (67mm)
- Microfiber cleaning cloth
- Protective plastic case
- Quick user guide
🧪 Key Features & Specs
| Feature | Details |
|---|---|
| Type | Variable Neutral Density Filter |
| Stops | 1–9 Stops (ND2 to ND400) |
| Thread Size | 67mm |
| Glass Quality | Japanese optical glass |
| Coating | Multi-layer, waterproof & anti-scratch |
| Frame | Aluminum alloy, slim profile |
| Compatibility | All 67mm lens threads |
| Series | B-Series (budget-friendly performance) |
🏞️ Real-World Performance
☀️ Daylight Video Shooting
When shooting video at 1/50s shutter speed in direct sun, this ND filter allows me to maintain proper motion blur while keeping ISO and aperture within ideal ranges. Twist the front ring, and you can quickly darken the scene to match your needs.
🌊 Long-Exposure Photography
Want silky waterfalls or motion-blurred clouds? The K&F filter gets the job done. At ND400, I achieved shutter speeds of 10–30 seconds mid-day — perfect for dreamy landscape shots.
💡 Image Quality
✅ Color neutrality is surprisingly good for the price
✅ No harsh vignetting up to about 8 stops
⚠️ Cross pattern (X effect) begins to appear beyond ND256 on wide lenses (common with all budget VNDs)
⚖️ Pros & Cons
✅ Pros
- Wide range of light reduction (ND2–ND400)
- Easy to use twist ring with clear markers
- Good optical quality for budget class
- Comes with microfiber cloth and case
- Great for both stills and video
- Water-resistant and scratch-proof coatings
❌ Cons
- Slight softening at max ND range
- Cross-polarization (X-pattern) can appear at extreme settings
- No hard stops — can be over-rotated past optimal range
- Doesn’t match the color accuracy of high-end brands like PolarPro or B+W
🔬 Who Should Buy This?
- 🎥 YouTubers/Vloggers shooting outdoors in bright conditions
- 🌄 Landscape photographers who want long exposures
- 🧳 Travelers who need compact, all-in-one ND flexibility
- 💸 Budget-conscious creators needing exposure control without the $100+ price tag
If you’re just starting with ND filters or want a reliable backup for fieldwork, this filter delivers exceptional value.
❓ FAQ For Concept 67mm Variable ND2–ND400
Will this fit my lens?
It fits any lens with a 67mm thread. Check your lens cap or front ring for “Ø67mm.”
Does it affect image quality?
Slight softening and a mild warm tone may appear at higher densities, but for the price, performance is excellent.
Is it waterproof?
It’s water-resistant and easy to wipe clean — good for light rain or splashes.
Can I use this on a full-frame camera?
Yes — as long as your lens thread is 67mm.
Is it good for gimbal video shooting?
Yes. The smooth control lets you adjust exposure on-the-fly during filming.
📊 Comparison Table
| Feature | K&F Concept 67mm ND2–ND400 | PolarPro Peter McKinnon ND | Gobe ND2–400 |
|---|---|---|---|
| Stops | 1–9 | 2–5 or 6–9 (2 variants) | 1–8 |
| Price | 💰 Budget | 💎 Premium ($200+) | 💵 Mid-range |
| Image Quality | Good (minor softness) | Excellent | Fair to Good |
| Anti-X Pattern | No | Yes | No |
| Best For | Beginners & Hobbyists | Professionals | Occasional Users |
Concept 67mm Variable ND2–ND400
💬 Final Verdict — Should You Buy It?
If you’re in the market for a high-performance variable ND filter under $50, the K&F Concept 67mm Variable ND2–ND400 is an excellent buy. It provides flexible exposure control, decent image quality, and durable build — all without breaking the bank. Concept 67mm Variable ND2–ND400.
Sure, it may not match $200 filters in terms of sharpness or anti-X pattern design, but for everyday creators, it’s more than good enough. Whether you’re experimenting with long exposures or leveling up your video lighting, this filter is a smart investment for any budget gear kit. Concept 67mm Variable ND2–ND400.
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👉 Explore our guide to the Best Variable ND Filters for Filmmakers
