NiSi Filter Pro Nano AIR UV 40.5mm

NiSi Filter Pro Nano AIR UV 40.5mm – 99.9% Transmission for Crystal Clear Protection

The NiSi Pro Nano AIR UV 40.5mm filter protects your lens while maintaining exceptional optical performance. It delivers extremely high transmission and low reflectivity using NiSi’s ULRC (Ultra Low Reflective Coating). As a result, you preserve image clarity and color accuracy while shielding your lens from everyday hazards.

Optical performance and imaging benefits

This UV filter achieves a peak transmission of 99.9% and an average transmission of 99.6% between 420–680 nm. In addition, it shows minimal reflectivity of just 0.1%. These numbers mean the filter remains nearly as transparent as air, helping to retain contrast and fine detail. It is engineered to support cameras and lenses that exceed 100 megapixels, so it preserves resolution even in very high-megapixel workflows.

Advanced coating and durability

NiSi uses a 48-layer ULRC nano-coating on the glass surface. The multilayer design provides multiple protective properties:

• Scratch resistance
• Stain resistance
• Waterproof and oil-proof properties

These coating properties make the filter better suited to harsh outdoor shooting conditions, helping the glass resist contaminants and surface damage during use.

UV protection and color accuracy

The filter blocks ultraviolet light below 395 nm. By reducing UV transmission in this band, the filter helps minimize UV-induced interference such as blue haze and other color shifts. This results in improved color fidelity and clearer images in situations where UV light would otherwise affect the capture.

Materials and mechanical design

The NiSi Air UV uses carefully selected, high-end lens optical glass to ensure consistent optical quality. The frame is an ultra-thin knurled brass design. Brass offers greater resistance to deformation compared with aluminum frames and the thin profile helps prevent vignetting with ultra-wide-angle lenses. The knurling provides a secure grip for straightforward mounting and removal.

Quality control and testing

NiSi tests each Air UV filter with a spectrophotometer to verify transmission and reflectivity. This precise measurement process ensures the filters meet consistent performance standards. NiSi specifies that testing is performed using a Shimadzu spectrophotometer for transmission and reflectivity verification.

Features

• 99.9% Transmission Clarity - Achieves an incredible 99.9% peak transmission rate with ULRC coating, making it extremely transparent and compatible with premium lenses for optimal image quality.
• 100-Megapixel Compatibility - Retains exceptional resolution and detail for high-performance cameras that exceed 100 megapixels, ensuring no loss of sharpness.
• Advanced 48-Layer ULRC Coating - The 48-layer nano-coating provides scratch, stain, water, and oil resistance for durable, reliable performance in demanding conditions.
• Blocks UV Light Below 395 nm - Reduces blue haze and UV-induced interference to improve color accuracy and clarity in challenging lighting.
• Premium Optical Glass - Constructed from high-end lens-grade optical glass that has undergone strict selection to maintain optical integrity.
• Ultra-Thin Brass Frame - A durable brass frame resists deformation, features precise knurling for easier mounting and removal, and remains slim to help avoid vignetting on ultra-wide lenses.
• Exceptional Reflectivity Control - With only 0.1% reflectivity, the filter minimizes glare and internal reflections to preserve cleaner images.
• Precision Tested for Quality - Each filter undergoes strict transmission and reflectivity testing with a Shimadzu spectrophotometer for consistent optical precision.
• Lens Protection and Image Enhancement - Protects lenses from dust, scratches, and moisture while maintaining the full imaging potential of high-quality lenses.
• Perfect for Outdoor Shooting - The water-, oil-, and stain-resistant coating and durable frame make the filter well suited to landscape, travel, and outdoor photography.

Packaging includes

• NiSi Pro Nano AIR UV Filter (40.5 mm)
• NiSi Microfiber Cleaning Cloth

FAQ

Question: Will this filter affect image sharpness or detail on high-resolution cameras?
Answer: No. The NiSi Air UV is specified with a 99.9% peak transmission and is engineered to support cameras and lenses that exceed 100 megapixels, so it preserves sharpness and fine detail.

Question: How does the filter handle reflections and flare?
Answer: The filter’s ULRC coating keeps reflectivity to about 0.1%, which greatly reduces glare and reflections. This helps maintain cleaner highlights and contrast when shooting in strong light sources.

Question: Is the filter suitable for outdoor and harsh environments?
Answer: Yes. The 48-layer nano-coating provides scratch, stain, water, and oil resistance, and the brass frame is more deformation-resistant than aluminum. Together these features make the filter robust for outdoor use.

Question: Will it cause vignetting on wide-angle lenses?
Answer: The filter uses an ultra-thin brass frame designed specifically to reduce the risk of vignetting on ultra-wide-angle lenses, helping you keep full-frame coverage.

Question: What size options are available, and which size is this listing?
Answer: NiSi Pro Nano AIR UV filters are available in sizes from 37 mm up to 105 mm. This listing is for the 40.5 mm size.

Question: What comes in the box and how is quality confirmed?
Answer: The package includes the NiSi Pro Nano AIR UV filter and a NiSi microfiber cleaning cloth. Each filter is inspected and tested for transmission and reflectivity with a Shimadzu spectrophotometer to ensure consistent optical performance.