


The Base Kit Pro features the UV and CPL Pro — delivering shatter-proof protection and precision polarisation. Built with AERO-C10™ ionically tempered glass and German SCHOTT B270 glass, both enhanced by our proprietary CoraNano™ Max dual-side coating, ensuring maximum durability and flawless optical performance with industry-leading reflectivity, light transmission and true-to-life colour fidelity.
- 600% stronger shatter-proof UV
- Professional polarised light blocking CPL
- CoraNano™ Max 34-layer dual-side nano-coating
- Industry-leading UV with >99.13% light transmission and reflectance <0.15%
- Industry-leading CPL reflectance ≤ 0.5%
- True Colour transmission free from unnatural casts
- Ultra-slim profile prevents vignetting
- Warp-resistant aluminium frame
- Lifetime warranty
Filter Type
Ultraviolet (UV) protection, Circular polarising (CPL)
Exposure Reduction
Reduction: 1.3 stops (CPL)
Glass
AERO-C10™ (UV), German SCHOTT B270 (CPL)
Coating
34-layer CoraNano™ Max
System
Threaded
Frame
6061 Aluminium
Sizes
39mm–95mm diameters
Warranty
Lifetime warranty
To find out more information about the impact of this Urth product, view our Life Cycle Analysis (LCA) report here
Free standard shipping within the continental US for orders $100 and over.
We ship directly from the US via USPS, UPS and DHL express for faster, safer delivery.
Standard shipping:
US: 3-7 days.
Rest of World: 8-18 days.
Express shipping:
US: 2-4 days.
Please allow an extra 2 days for regional areas.
Base Filter Kit Pro

1
CoraNano™ Max Coating
34-layer nano-coating engineered for ultra-high light transmittance, ultra-low reflectivity, true-to-life colour neutrality and advanced resistance to water, oil and fingerprints.

2
AERO-C10™ Lens Shield
Our patented AERO-C10™ glass is ionically tempered for up to 600% stronger and 200% more scratch resistant lens protection without any image distortion.

3
Unparalleled Optical Performance
Strength meets world-class optics with the UV Pro — over 99.13% light transmission and under 0.15% reflectance means pure light with zero compromise.

4
Aerospace-Grade Frame
Precision-machined from aerospace-grade aluminium, the ultra-slim frame is both lightweight and exceptionally strong.


1
CoraNano™ Max Coating
34-layer nano-coating engineered for ultra-high light transmittance, ultra-low reflectivity, true-to-life colour neutrality and advanced resistance to water, oil and fingerprints.

2
Unparalleled Polarisation
Industry-leading control and glare reduction on water, glass and reflective surfaces, with <0.5% reflectance and True Color transmission for unmatched detail and fidelity.

3
SCHOTT B270 Glass
Industry-leading German optical glass maintains image sharpness, tonal accuracy, and pure light transmission without distortion.

4
Precision Rotation Control
New square grip design with integrated control lever ensures smooth, accurate polarisation adjustments.

Design Features

Expedition-Grade Strength
Built with corrosion-resistant aluminium and dual-sided hydrophobic coatings for demanding environments and professional use.

Pro Optical Performance
CoraNano™ Max coated German SCHOTT B270 glass delivers industry-leading clarity, light transmittance and colour accuracy while reducing flare.

Responsible Design
A Certified B Corp, Urth meets high standards of social and environmental responsibility, ensuring a 10x net-positive impact.
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