K&F Concept Variable ND Filters Video
Presenting my video review of the K&F Concept Nano-X variable ND filters. After extensively testing the ND8-128 version, I felt it was about time I shared my insights through this review.
For years, I have steered clear of variable ND filters for a couple of reasons. One is that the cameras I primarily use feature built-in ND, and the other is due to a past encounter with subpar VNDs that left me skeptical. However, with my recent affinity for filming using Sony Alpha cameras that lack built-in ND, I decided to revisit variable NDs, aiming to streamline my gear by avoiding carrying a load of fixed ND filters.
After exploring K&F Concept's extensive range, I settled on the ND8-128 from their Nano-X series. Covering 3-7 stops, it perfectly suits my general-purpose video needs, enabling me to smash out an f1.4 aperture, even in that rare British daylight.
The standout feature of the Nano-X range is its absence of the dreaded X shadow—a flaw that plagued my VND experience a decade ago. Opting for the ND8-128 also reflects a conservative approach to the filter's range. While more aggressive options exist, I leaned towards avoiding potential imperfections and stuck to a range that aligns with my actual requirements.
Addressing concerns about flaws such as loss of sharpness, color cast, vignetting, and the notorious S shadow, my worries were unfounded. K&F Concept's filters proved remarkably impressive.
Packaged in an elegant magnetic cardboard box with an Apple-esque vibe, the filter comes nestled on a bit of foam in a protective plastic hardcase. It’s just enough to keep the filter from moving around, and is perfect for tossing it into your camera bag.
The filter’s substantial build, while relatively large and heavy, speaks to its higher quality. The thick aluminum boasts a robust thread, preventing the common issue of thread compression with even light touches. Operation is smooth yet stable, ensuring it remains in place even when subjected to vibrations on a gimbal or slider.
One standout feature is the built-in end-stops, restricting use beyond the intended range (ND8-128). This innovative design significantly minimizes the risk of the dreaded X shadow, a common woe when users push a VND beyond its intended limits.
Beyond this, the filter is water-resistant and scratch-resistant. Rain tests proved successful, and despite regular use amid leaves, twigs, and brambles while shooting my Coffee in the Woods series, it maintains a like-new appearance.
In terms of performance, there's no noticeable loss of sharpness, vignetting, or the infamous X shadow. While a minor color temperature shift to the right exists, it's negligible and easily rectified during white balancing and color grading, common practices in videography.
Offering excellent value for money, the K&F Concept Variable ND Filter ND8-128 Nano-X is available in various sizes. If you're aiming for bonkers depth-of-field shots, consider picking one up—it's a surefire way to elevate your videography without disappointment.