The NiSi UV filter is built with the highest quality lens grade optical glass from the highest transparency glass HT (or HUC, High-ultra Clarity), the best on the market, exclusive to NiSi. The absorption of UV light, which can cause a bluish cast on daytime photos and videos, is ensured by a special absorbent treatment that reduces UV light by almost 100%b elow 395 nanometers in wavelength.
HUC high transmission glass has a 99.2% visible light transmission, while the brass structure is obtained from a single block and machined with CNC machines. Brass results in less chance of binding which can be an issue with normal aluminium frames.
The HT (or HUC) NiSi UV filters are built with precision and with the most modern technologies available. The quality control and tests carried out allow to obtain incredible precision.Thanks to the Nano® treatment, the water is not spread on the surface of the filter, but remains compact and easy to remove. The Nano® treatment makes NiSi filters weather-resistant and ready for any situation.
HT glass (High Transmission 99.2%), HUC (High-ultra Clarity): this robust glass with no loss of detail is exclusive to NiSi. The ND 10 Stop Circular NiSi filter also uses optical glass for precision applications; the highest quality for your goals.