NiSi Filter UV Pro Nano Huc 40.5mm

NiSi Filter UV Pro Nano Huc 40.5mm – Ultra-thin 3.5mm Brass Frame to Minimize Vignetting

The NiSi Filter UV Pro Nano Huc 40.5mm uses high-quality Japanese ultraviolet absorption optical glass and advanced coatings to protect your lens while maintaining excellent image transmission. It features an ultra-thin brass frame that helps prevent vignetting on wide-angle lenses. You can leave this UV filter on your lens as a general-purpose protective filter.

Key features and coatings

The filter employs double-sided, multi-coating lens technology to reduce unwanted reflections and to assure high transmittance. In addition, NiSi applies an exclusive creative "U" type Nano coating plus a hardened waterproof coating to the optical surfaces. Together these coatings improve surface smoothness, make the filter easy to clean, and help repel moisture.

Frame design and compatibility

NiSi constructs the frame from brass using highly accurate brass milling. The frame measures only 3,5mm in thickness, making this an ultra-thin filter that fits well on super wide-angle lenses. As a result, the design minimizes the chance of vignetting while still providing a secure threaded connection for lenses with a 40.5mm filter thread.

Protection and everyday use

This UV filter serves as a general protective element to leave on your lens. Filters help reduce dust and moisture from reaching the front element and provide an added layer of protection against scratches and minor impacts. In practice, you can keep the filter mounted to lower the risk of damage to the lens’ front element during regular use.

Detailed facts (expanded)

• Ultraviolet absorption optical glass
• Brass Frame constructed with highly accurate Brass milling.
• Exclusive creative "U" type Nano coating.
• Hardened waterproof coating.
• Top level optical surface machining accuracy.
• Ultra thin (3,5mm): Minimize vignetting effect on wide angle lenses
• High quality optical glass for high transmittance (>99,2%) and highly smooth surface with only 0,3% reflection
• Protect the lens from dust, damage to the front element
• Easy to clean

Specifications

FAQ

Question: Is this NiSi UV filter suitable for wide-angle lenses?
Answer: Yes. The ultra-thin brass frame measures 3,5mm, which minimizes the risk of vignetting and makes the filter suitable for use on super wide-angle lenses with a 40.5mm thread.

Question: What coatings does the filter have and what do they do?
Answer: The filter uses double-sided multi-coating, an exclusive "U" type Nano coating, and a hardened waterproof coating. These coatings reduce reflections, increase transmittance, improve surface smoothness, repel water, and make the surface easier to clean.

Question: Can I use this filter as permanent protection on my lens?
Answer: Yes. The filter is intended for general protective use and helps reduce dust and moisture reaching the lens, while providing extra protection against scratches and minor impacts to the front element.

Question: How does the optical quality compare for transmission and reflection?
Answer: The NiSi PRO Nano HUC UV filter uses high-quality optical glass with transmittance greater than 99,2% and a highly smooth surface with only 0,3% reflection, helping to maintain image quality while protecting the lens.