Maximum optical performance - the PXV2 from Dragon. The PXV2 combines Dragon's groundbreaking Panotech™ lens system with the super-fast Swiftlock lens change system. The size is exactly in the optimal range. Slightly smaller than the PXV and slightly larger than the popular NFX2. Dragon's Panotech™ lens system features a unique curvature that allows it to wrap around the frame more, for an expanded field of view in a visually appealing design.Lumalens® Dark SmokeLumalens® technology provides optimised colour and glare protection through an ionised lens coating. The hard coating is scratch resistant and repels dirt, dust, oil and water.Transmittance of visible light: 23 %Bonus Lens: Lumalens® Rose Transmittance of visible light: 36 %