KP3778-1 - Lincoln Viking 2x4C Auto-Darkening Lens Fixed Shade 10

Advanced Optics for Traditional Helmets

The Lincoln Electric VIKING™ 2x4C® Series Auto Darkening Lens (KP3778-1) represents a significant leap forward in welding optics for users of traditional pipeline and pancake-style helmets. Designed to fit the standard 2-inch by 4.25-inch cartridge slot, this lens upgrades your existing hood with Lincoln's proprietary 4C® Lens Technology. Unlike conventional auto-darkening filters that cast a green hue over the work area, the 4C technology broadens the color range in both light and dark states, delivering a true-color view of the base material, arc, and puddle. This clarity helps reduce eye strain during long shifts and improves weld quality by allowing for better visibility of the weld pool nuances.

Engineered for durability and consistency, the KP3778-1 features a Fixed Shade 10 dark state, making it ideal for a wide range of low to medium amperage welding applications. The lens returns to a clear Shade 3 light state when the arc is extinguished, facilitating seamless setup, grinding, and inspection without the need to flip the helmet up. The unit is housed in a high-temperature ABS casing designed to resist heat deformation, a common failure point in inferior lenses used in high-heat environments.

Reliability is key in professional welding, and the Viking 2x4C delivers with a solar-rechargeable power system that draws energy from the welding arc and ambient light, eliminating the hassle of battery replacements. Two independent arc sensors ensure rapid and consistent switching, while the slim 0.20-inch profile ensures compatibility with most helmet retention systems and allows space for cheater lenses if required. Backed by a 2-year warranty, this lens is a premium choice for welders seeking modern performance in a classic form factor.