The worlds thinnest and lightest 4 stop Hard Graduated ND filter with tempered impact resistant glass. 

The New Athabasca 4 stop Blade Hard graduated ND filter features a unique SUPER THIN 1.1mm design that is impact resistant which is a world first for square filters. 

Features:

- Tempered glass offers impact resistance which is a world first that you will appreiciate.
- Double sided coating on opticaly enhanced glass providing industry best features.
- Nano Anti Reflective coating, providing incredible Scratch resistance realising an optically superior filter.
- Stain and water resistant square filters that are easy to clean. Be assured that any water droplets from the environment will not affect  Athabasca coatings.             
- Blade 4 stop HGND filters provide an amazing low reflections and light reducing layer.
- Thinnest and most lightweight 4 stop filters in the world weighing at only 39g for GND filters. Being so lightweight and durable means a greater experience in travel. You can take these with you and not have to worry about adding on much weight to your kit.