Breakthrough Photography 58mm X4 Neutral Density 3.0 Filter (10-Stop)

Resolving critically sharp and delivering best-in-class color neutrality, the X4 ND combines the best optical engineering and asignature traction frame in an ultra-slim form factor for the discerning outdoor photographer.

Sharper and more color neutral

High-quality ND filters have long been defined by their ability to control color cast, and the X4 ND is no exception. With the X4 ND Breakthrough Photographydidnt want to manufacture just another ND filter. Theybelieve that a critically sharp and color neutral performance is essential for professional real-world results.

The X4 ND features critically sharp H-K9L optical glass made in Japan, and incorporates state-of-the-art and uniformly applied MRC8 to eliminate unwanted glare and ghosting which easily gets compounded at long exposures. And theMRC8 is structurally harder than the glass itself, providing a protective scratch-resistant layer, shielding the glass from the elements of frequent fieldwork.

How does poor quality MRC adversely affect image quality?

Poorly coated ND filters commonly exhibit visible flaring, ghosting, low-contrast and a reduction of sharpness, and increase exponentially with a longer exposure. This also has the unfortunate effect of lowering the optical performance of the lens to the optical performance of the uncoated filter.

Design & Craftsmanship.

The moment you pick up X4 ND youll immediately feel the craftsmanship and quality. Each filter hasprecisely machined traction frames from environmentally friendly aluminum, and its matte black finish reflections are absorbed rather than reflected into the lens barrel.

The X4 featuresa3.5mm ultra-slim double-threaded tractionframe to eliminate vignetting onwide-angle full-frame setups.

Why 3.5mm? In lab tests4.3mm was the frame width at which point vignetting becomes noticeable on 16mm wide-angle setups on full-frame setups. Any lessthan 3.0mm and lens caps dont have enough surface area to grab onto. At 3.7mm vignetting isentirely eliminated.

Fully equipped for the great outdoors.

In addition to state-of-the-art MRC8, optical engineers developed new nano coating layer technology, callednanotec, from the ground up to repel dirt, water and other elements by beading rather than absorbing and smearing. Set in completely weather-sealed X4 traction frame the X4 ND was built to withstand the harshest of environmental conditions, guaranteed to be free from craftsmanship defects for 25 years.

Double-threaded & Laser Engraved.

They laserengrave letteringinto the X4 ND tractionframetoensure that the lettering wont ever fade or come off after consistent use. Theyalso engrave each and every X4 tractionframe with a unique serial number.

When you activate your25 Year Ironclad Guaranteeonline theyassociateyour X4 serial number to you,so any future discussions on this unique filter are tracked, issues recorded and all that stuff which goes into future product design.