K&F Concept Lifts the Hood on Filter Coatings as Photographers Weigh Glass Protection Against Optical Purity
Published on 09/05/2026 at 07:41 | Editorial boerse-global.de
Photographers who obsess over every fraction of a percentage point in light transmission now have fresh ammunition for their next lens-filter purchase. K&F Concept has published detailed performance data across its protective filter lineup, spelling out exactly how many layers of coating sit on each piece of glass and what that means for reflection and clarity.
The headline numbers come from the company's top-tier Nano-X PRO series, which stacks 36 layers of nanocoating to achieve a 99.9% light transmission rate. Residual reflection on these filters measures just 0.15%, and K&F Concept backs the series with a decade-long warranty. Pricing scales with diameter: the 77mm version (KF01.1984) is currently listed at €56.39, down from €126.99 — a 55% discount — while the 82mm variant (KF01.3198) carries a €94.99 price tag. Smaller 43mm and 58mm models run €74.99 and €79.99 respectively.
One step below in the hierarchy sits the Nano-Xcel series, which uses 28 coating layers to push reflection down to 0.1% while transmitting 99.8% of incoming light. A 77mm UV filter from this range is selling for €31.99, reduced from its original €52.99 list price.
Specialty Glass for Taming Harsh Light
Beyond straightforward protective elements, the company detailed several filters engineered for photographers wrestling with difficult lighting conditions. A 77mm CPL filter from the Nano-X series relies on German SCHOTT B270 glass and claims to cut polarized light by 99.9%. Its price has dropped from €86.99 to €59.49.
For shooters dealing with mixed lighting scenarios, K&F Concept offers a combined 2-in-1 filter that merges CPL functionality with a Black Mist 1/4 diffusion effect. That model also reduces polarized light by 99.9% per the manufacturer's specifications and holds reflection at 0.1%. It sells for €112.93.
Variable ND users get attention too: a filter covering the ND8-ND2000 range — spanning 3 to 11 f-stops — is built with waterproof construction and 24 coating layers, priced at €51.19.
Budget Lines and Glass Sourcing
The entry-level tiers rely on Japanese optical materials, with AGC glass appearing across several models. The Nano-D series CPL filters use 24 layers for reflection control and contrast enhancement, with an 82mm unit available at €37.99. Nano-Klear UV filters step down to 18 layers and aluminum frames; 46mm and 62mm versions each cost €8.99, though the 40.5mm model at that same price is currently marked as sold out. A standard 52mm UV filter made from AGC glass handles both UV light and blue-cast reduction for €17.84.
Customer reception across the product range has been strong, with most ratings landing between 4.8 and 5.0 out of 5. The underlying engineering goal, according to the specifications, is straightforward: multilayer coatings should leave the optical character of the primary lens essentially untouched while adding a durable mechanical barrier against scratches and impact to the front glass element.
