NiSi Filter Protector Pro Nano Huc 40.5mm

NiSi Filter Protector Pro Nano HUC 40.5mm – Ultra-thin 3.5mm Frame to Minimize Vignetting

The NiSi Filter Protector Pro Nano HUC 40.5mm provides reliable front-element protection while maintaining excellent light transmission. It uses high-quality optical glass with nano coating on both sides to allow 99.3% of light to pass through. The ultra-thin aluminum frame measures 3.5mm, so it fits even on super wide-angle lenses to help avoid vignetting.

Built for protection and optical clarity

Use this protector to shield your lens from dust, impacts, and everyday wear without sacrificing image quality. Because the glass has a highly smooth surface and low reflection, the protector preserves contrast and brightness while acting as a sacrificial layer in front of the lens.

Durable frame and finish

The frame is made from high-quality aluminum and receives superfine dull polishing and elaborate knurling. Additionally, this finishing ensures that the frame will not blanch because of repeated rotation, so you can mount and remove the filter often without cosmetic wear affecting operation.

Coatings and cleaning

The protector features NiSi's exclusive creative "U" type Nano coating applied to both sides, plus a hardened waterproof coating. Together, these coatings reduce reflections and make the surface easy to clean, so smudges and moisture rinse or wipe away more readily.

• Ultra thin frame (3,5mm) to minimize vignetting on wide angle lens — the slim profile helps maintain full-frame coverage on wide lenses.
• High quality optical glass for high transmittance (>99,3%) and highly smooth surface with only 0,3% reflection — this preserves image brightness and reduces stray reflections.
• Exclusive creative "U" type Nano coating. The coating sits on both sides of the glass to protect optics and improve cleanability.
• Hardened waterproof coating. This layer helps shed water and resist surface damage from the elements.
• Protect the lens from dust, damage to the front element — the protector serves as the first line of defense for your front element.
• Easy to clean — coatings and smooth glass make routine cleaning quick and effective.

FAQ

• Question: Will this protector cause vignetting on my wide-angle lens?

  Answer: The protector uses an ultra-thin 3.5mm frame designed specifically to minimize vignetting, so it fits well even on many super wide-angle lenses. However, lens-specific results can vary, so check fit on your particular lens.

• Question: How does the Nano coating affect image quality?

  Answer: The Nano coating on both sides reduces surface reflection (reported at 0.3%) and helps maintain high transmittance (>99.3%), so the protector preserves brightness and contrast while protecting the front element.

• Question: Is the filter easy to clean and resistant to water?

  Answer: Yes. The hardened waterproof coating helps repel moisture, and the Nano-coated glass is easy to clean, making routine maintenance straightforward.

• Question: Will the frame show wear after repeated use?

  Answer: NiSi applies superfine dull polishing and elaborate knurling to the aluminum frame so it will not blanch because of repeated rotation, helping it remain functional and presentable over time.