Critically Sharp SCHOTT B270
The X4 features SCHOTT Ultrawhite B270 optical glass made in Germany. Our state-of-the-art multi-resistant coating has 16-layers (MRC16) which increases light transmission to 99.4% and creates a protective layer that's structurally harder than the glass.
The forefront of Nano Coatings built into both sides
Material
Schott B270 optical glass, brass
Frame
Ultra-slim double-threaded 3.1 mm traction frame
Coating
16-layer MRC16 and Nanotec nano coating
Light Transmission
99.4%
Weather Sealing
Yes
Serial Number
Laser-engraved, unique per filter
Summarized by Shop
5.0
3 ratings
5
4
3
2
1
Superb fit and finish. Optimal quality!
E
Eirik · June 24, 2026
Zero issues with ordering from Breakthrough Filters. And the shipping was super fast!
