K&F Concept 18 Pieces Filter Ring Adapter Set Review — The Ultimate Step-Up/Step-Down Kit for Every Lens Swap Situation
Thomas Whether you’re a beginner or a seasoned photographer, one thing is guaranteed: your filters won’t always match your lens threads. That’s where the K&F Concept 18 Pieces Filter Ring Adapter Set comes in. With 9 step-up rings and 9 step-down rings included, this kit offers complete flexibility across your entire camera bag — saving time, hassle, and money.
Let’s explore why this compact yet powerful set deserves a permanent place in your gear pouch. Concept 18 Pieces Filter.
Concept 18 Pieces Filter
- Include Step Up Filter Adapter Ring Kit(37-49, 49-52, 52-55, 55-58, 58-62, 62-67,67-72, 72-77, 77-82mm)
- Include Step Down Filter Adapter Ring Kit(49-37, 52-49, 58-55, 55-52, 62-58, 67-62,72-67, 77-72, 82-77mm )
- Great tightness,no wobbling or cross-threading. Ultra-low chemical residues, attached to a solid!
🔍 Why I Bought This Filter Ring Adapter Set
As a photographer who uses multiple lenses (from 49mm primes to 82mm zooms), buying filters for each one can get expensive — and fast. I wanted:
- A full range of adapters that cover 49mm to 82mm
- High-quality aluminum rings that wouldn’t stick or strip
- Clear labeling so I can swap rings quickly in the field
The K&F Concept kit checked all my boxes, offering:
✅ A complete 18-ring solution (9 step-up + 9 step-down)
✅ Premium anodized aluminum alloy
✅ Easy screw-on threading with no jamming
✅ Great value under $40
📦 What’s in the Box?
- 9 Step-Up Rings: 37-49mm, 40.5-49mm, 43-49mm, 46-49mm, 49-52mm, 52-55mm, 55-58mm, 58-62mm, 62-67mm
- 9 Step-Down Rings: 67-62mm, 62-58mm, 58-55mm, 55-52mm, 52-49mm, 49-46mm, 46-43mm, 43-40.5mm, 40.5-37mm
- Protective case
- Microfiber cleaning cloth
- Compact packaging with clear sizing chart
🔧 Features & Benefits
| Feature | Details |
|---|---|
| Material | High-grade aluminum alloy |
| Finish | Matte black, anti-reflective coating |
| Threading | Precision CNC machined |
| Markings | Laser-engraved sizes for fast identification |
| Compatibility | Universal fit for all DSLR and mirrorless lens threads |
| Use Cases | ND filters, CPL filters, lens caps, macro adapters, etc. |
🧪 Real-World Use Experience
🎯 Step-Up Ring Use
I mainly use a 67mm ND filter. With this kit, I can attach it to my 49mm, 52mm, and 58mm lenses easily without rebuying filters. No visible vignetting, even on wide-angle shots. Concept 18 Pieces Filter.
🔄 Step-Down Ring Use
Great for attaching smaller filters to larger lens threads (though beware of potential vignetting). I also use them to fit mismatched lens hoods or reverse rings for macro photography.
🧵 Build Quality
The CNC-machined aluminum threads are smooth and precise. They don’t get stuck like cheaper brass/plastic alternatives. The matte black finish eliminates reflection and glare.
⚖️ Pros & Cons
✅ Pros
- Full range of adapter sizes (step-up & step-down)
- Durable, high-quality aluminum material
- Clear, laser-engraved size labels
- Compact, easy to carry in gear bags
- No stuck threading or stripped rings
- Saves money by avoiding duplicate filters
❌ Cons
- No storage pouch included (though compact enough for your camera bag)
- Slight risk of vignetting if step-down is used with wide-angle lenses
- Not stackable with all third-party filter holders
🧠 Who Should Buy This Kit?
- 📷 Photographers with multiple lenses and only a few filters
- 🎥 Filmmakers using ND filters across several lenses
- 💼 Content creators who shoot in different lighting conditions
- 🔁 Macro shooters who use reverse rings or need odd-size adapters
- 💸 Budget-conscious shooters who want max flexibility with minimal spend
❓ FAQ For Concept 18 Pieces Filter
Will this fit Canon/Nikon/Sony lenses?
Yes, it fits all brands — just match your lens thread size (look for Ø symbol on your lens).
Will using a step-down ring cause vignetting?
Possibly, especially on wide lenses or when stacking filters. Stick to step-up rings for best results.
Are the rings metal or plastic?
They’re made of anodized aluminum — durable and rust-resistant.
Can I stack multiple rings?
Yes, but stacking too many may affect image quality or filter alignment.
📊 Comparison Table
| Feature | K&F Concept 18-Piece Set | Neewer 18-Piece Adapter Set | Gobe Step Ring Set |
|---|---|---|---|
| Material | Anodized Aluminum | Aluminum | Aluminum Alloy |
| Markings | Laser-engraved | Printed | Etched |
| Step Rings Included | 9 up + 9 down | 9 up + 9 down | 9 up only |
| Case Included | ❌ No pouch | ✅ Yes | ❌ No |
| Threading Smoothness | ✅ Excellent | ⚠️ Moderate | ✅ Smooth |
| Price Range | 💵 Budget | 💵 Budget | 💸 Slightly Higher |
Concept 18 Pieces Filter
💬 Final Thoughts — Is It Worth It?
If you’ve ever fumbled with mismatched filter sizes or cursed yourself for buying another ND filter for a new lens, the K&F Concept 18-Piece Adapter Set is your answer. It’s affordable, durable, and saves you from wasting time (and money) on duplicate gear. Concept 18 Pieces Filter.
Whether you’re using filters for long-exposure, filming with ND/CPL, or just want peace of mind during lens swaps — this kit earns its place in any camera bag. Concept 18 Pieces Filter.
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👉 Check out the K&F Concept Filter Ring Set on Amazon
👉 Read our guide: Best Accessories for Mirrorless Shooters
