HD PENTAX D FA macro 100mm F2.8ED AW lens, dustproof, weather resistant (All Weather) construction, black

[Exceptional imaging performance] The lens incorporates one ED (Extra-low Dispersion) glass optical element and two Anomalous Dispersion glass optical elements to compensate for various aberrations and minimize the generation of the unwanted purple fringe effect. [Dustproof, weather-resistant AW construction] Lens features dustproof, weather-resistant AW (All Weather) construction for exceptional outdoor shooting reliability. [Exclusive exterior design and outstanding operability] The lens has an attractive, stylish appearance, with metallic exterior parts meticulously machined from high-grade aluminum. [Compact, lightweight design] Lens has a compact, lightweight design, with outstanding weight distribution, ergonomics and maneuverability [Circular diaphragm] Round-shaped diaphragm produces a natural, beautiful bokeh (defocus) effect up from open apeture to an aperture of F5.6. [SP（Super Protect）Coating] PENTAX-original SP coating uses fluorine treatment on the front surface of the lens. This prevents adhesion of dust, water drops, grease and other substances.