K&F CONCEPT 4" x 5.65" Square ND8+ND64 Filter kit Compatible Review
A versatile and high-quality ND filter duo for serious video work, but check your matte box compatibility.
| Nd64 & Nd8 Filter Duo | This set includes a 4"x5.65" ND64 (6-stop) and ND8 ( |
|---|---|
| Hd Optical Glass For 4k/8k | Crafted from imported HD optical glass with double-s |
| 0.2% Reflectivity For Clea | With ultra-low 0.2% reflectivity, they minimize inte |
| K&f Concept Is The World's | Euromonitor, 2024 data. |
| Best for | Videographers using Tilta or SmallRig matte boxes who need versatile ND filtering for 4K/8K production. |
Product Overview
This K&F CONCEPT kit packs two square ND filters at 4" x 5.65", a common matte box format. It suits videographers shooting in bright light. The ND64 cuts 6 stops, and the ND8 cuts 3 stops, spanning moderate to strong light control. Both help you hold a wide aperture or slower shutter speed.
Imported HD optical glass with double-sided polishing forms the filters, aiming to preserve sharpness and avoid color casts. K&F CONCEPT states they meet the resolution demands of 4K, 6K, and 8K production. An ultra-low 0.2 percent reflectivity reduces flares and internal reflections. That makes them a potential asset for HDR and log-format shooting.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
This set includes a 4"x5.65" ND64 (6-stop) and ND8 (3-stop) filter, engineered for profess
Crafted from imported HD optical glass with double-sided polishing, both filters ensure ze
With ultra-low 0.2% reflectivity, they minimize internal reflections and flare from studio
Euromonitor, 2024 data.
Design and Build Quality
Square and sized 4" x 5.65", the filters match many professional matte box systems. They target Tilta and SmallRig matte boxes, though verify your specific model. The kit ships only the two filters. No protective case or adapter rings are mentioned, so you may buy those separately.
Build quality looks solid, with HD optical glass and double-sided polishing. A low 0.2 percent reflectivity rating points to a good anti-reflective coating. Missing a case is a minor inconvenience for storage and transport, since square filters scratch and collect dust easily.
Performance in Everyday Use
On performance, the ND64 and ND8 give precise light control. The 6-stop ND64 suits bright daylight when you want a wide aperture for shallow depth of field. The 3-stop ND8 helps on overcast days or for slight shutter speed changes. Together they cover a wide range of scenarios.
Optical quality is claimed high, with zero color shift and corner-to-corner sharpness, crucial for 4K/8K work. The 0.2 percent reflectivity holds contrast and cuts flare, a benefit for HDR and log footage. Real-world results may vary, so test for any color cast or sharpness loss in your setup.
Who Should Buy It
- Photographers using screw-on filters or those without a compatible matte box.
- No case or pouch included for storage Compatibility only with specific matte box systems May require additional adapter for some matte boxes
Full Specifications
Alternatives Worth a Look
The K&F CONCEPT 4" x 5.65" Square ND8+ND64 Filter kit is a solid pick for videographers who already own a compatible matte box. Filters bring good optical quality and versatile light control, and the low reflectivity helps professional work. Drawbacks stay minor: no case, plus verifying matte box compatibility. Need a reliable ND solution for video? This kit earns a look, but confirm it fits your gear.
Frequently Asked Questions
Are these filters compatible with all matte boxes?
The specifications state they are compatible with Tilta and SmallRig matte boxes. For other brands, you may need to check the dimensions and mounting system.
Do these filters cause any color shift?
According to the specifications, they are designed for zero color shift, thanks to the HD optical glass and double-sided polishing.
Can I use these filters for still photography?
They are designed for video and matte box use. For still photography, you would need a square filter holder, which is not included.
What is the reflectivity rating?
The reflectivity is 0.2%, which is very low and helps minimize internal reflections and flare.
Is a case included?
No, the kit includes only the two filters. You may need to purchase a separate case for protection.
This review is based on the manufacturer's stated specifications, the current Amazon listing and its image, and our research into this product category. The specific features described are as stated by the manufacturer; general points reflect how such products are used rather than fabricated details. We do not assert any specification beyond those listed, and we recommend confirming the current specifications on the live listing before buying. Scores are editorial judgments, not laboratory tests.