Refined title: Pentax HD 16-50mm F2.8 Standard Zoom Lens

The HD PENTAX-DA ★ 16-50mm F2.8ED PLM AW is Pentax's top-of-the-line STAR series lens, combining exceptional imaging power, image rendition, operability, and environmental resistance. Designed as part of the new-generation Star-series, it compensates for various aberrations to deliver sharp, clear images across the entire frame.

Incorporating one ED (Extra-low Dispersion) glass element, one anomalous glass element, and two ED aspherical glass elements, the lens effectively reduces chromatic aberration throughout the zoom range. Coupled with a high-grade, multi-layer HD Coating, it minimizes flare and ghosting even in challenging lighting conditions.

The lens features a fixed F2.8 maximum aperture across the 16-50mm focal length (equivalent to 24.5-76.5mm in 35mm format), making it an ideal regular-use lens for the PENTAX K-3 Mark III.

The redesigned optical system includes a lighter, more compact focus-lens group driven by an advanced PLM (Pulse Motor), ensuring smooth, high-speed autofocus operation with minimal noise. The minimum focusing distance of 0.3m and maximum magnification of 0.24x make this lens versatile for various subjects, from snapshots to close-ups and landscapes.

An electromagnetic diaphragm mechanism provides high-precision exposure control, allowing for smooth video recording even with significant brightness changes. When paired with compatible PENTAX camera bodies, the lens offers flawless exposure control and focus tracking with reduced operational noise during video shooting.

The dust-proof, weather-resistant construction allows the user to create a durable, reliable digital imaging system that performs well in demanding conditions. The lens also features Pentax's SP (Super Protect) Coating to keep the front surface free of dust and stains.

Other features include effortless manual-focus operation, a nine-blade circular diaphragm for natural bokeh, and a Quick-Shift Focus System for instant manual-focus adjustment.

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