The world's most advanced circular polariser.
X4 Series Filters
16 MRC Layers
Nano Coating Layers
3.1mm SCHOTT B270
Increases light transmission to 99.4% and creates a protective layer that's structurally harder than the glass
Our breakthrough nanotec® Nano Coating layer repels dirt, water and other elements by beading rather than absorbing, making it easier (and faster) than ever to clean
SCHOTT Ultrawhite B270 optical glass made in Germany
25 Year Warranty
Full traction texture around the entire circumference of the X4 makes it easier than ever to get off and on securely
Built to withstand extreme wind, salt water, dust and other abrasive conditions and elements
We stand behind each X4 ND to be free of defects in craftsmanship for 25 years, but they’ll easily last 50+ with proper care
What makes them the sharpest, most colour neutral filters in the world?
Our all-new and internally developed CPL film is at the core of the X4 CPL, and we manufacture it right here in California. To achieve the worlds most colour neutral performance, we had to develop a unique approach to manufacturing rather than selecting off-the-shelf CPL film common among filter manufacturers, which is designed and intended for LCD panels, not photographic optics.
All commercially available CPL filters exhibit a yellow cast due to a gradual transmission increase starting around 600nm and then spiking at 650nm onward into IR. With our X4 CPL film we achieved a gradual transmission decrease from 600nm onward, and instead of spiking uncontrollably near 650nm and far into infrared, the X4 CPL sees very controlled transmission into IR, without the curve spike. The real world result? Warm and lively images without the apparent colour cast.
The MRC16 Effect
Our state-of-the-art multi-resistant coating (MRC) is an optical coating applied to both surfaces of the glass disk to reduce reflection and to increase surface durability. Our proprietary MRC coating is structurally harder than the glass itself and the reduced reflections improve the efficiency since less light is lost. The reduction of reflections also improves the contrast of the image by elimination of stray light. The real world result? Better contrast and colour.
Low light transmission and green flaring are common problems with uncoated glass. As MRC coatings are added to each side of the optical disk light transmission steadily increases with flaring steadily decreasing. In our lab tests light transmission apexes at about 16-layers of MRC, and slowly decreasing in transmission at 18 and above. 8-layers of MRC are applied evenly to both sides of each optical disk resulting in MRC16.
In addition to featuring the highest resolving optics for today's highest quality lenses, we wanted to create a filter that was thinner and therefore lighter, but at the same time increase its functionality and it's durability. That led to some really surprising design challenges and innovations.
To achieve this we took the entire filter concept and went back to the drawing board. It's incredibly important to have filters on tight and very secure, as camera equipment unfortunately gets banged around quite a bit, and a filter falling off is not a good situation to be in.
Even despite the early tooling challenges during the prototype phase, and even though it was quite a bit more expensive to manufacture, the feedback that we got from photographers was overwhelming - traction frames are better than standard flat black frames.
Full traction texture around the entire circumference of the X4 makes it easier than ever to get off and on securely. Not only did we want to improve the design to make it easier and simply more practical, but we also wanted to take the materials to the next level. The X4 is machined from brass, which is stronger than aluminum, binds and jams less on lenses and with other filters (or step-up rings) and it just provides a more reliably solid feel.