Pentax
Pentax 28030 HD 16-50mm F2.8 Zoom Lens
★★★★★
Shoot razor-sharp event, portrait, and landscape work in any weather — the Pentax DA★ 16-50mm f/2.8 PLM AW delivers STAR-series resolving power with fast, silent autofocus.
$1,196.95*$1,499.95Save 20%
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Overview
Key Features
The HD PENTAX-DA ★ 16-50mm F2.8ED PLM AW represents Pentax's top of the line STAR series, combining exceptional imaging power and image rendition with outstanding operability and environment- resistant performance which compensates various aberrations to a minimum and delivers sharp, clear images.
The PLM Pulse motor provides high speed focusin. This zoom lens incorporates a newly designed optical system which features a lighter, more compact focus-lens group. By driving this focus-lens group with an advanced PLM (Pulse Motor), it assures smooth, high-speed autofocus operation with minimized operational noise.
Compatible with in body shake reduction of the K series DSLR cameras. The Pentax digital SLR camera K series is equipped with in-body shake reduction SR / SR II. Any lens compatible with the K-series camera can benefit from image stabilization
The rounded aperture blades provide a pleasing bokeh of light particles and does not become polygonal, achieving a natural and beautiful bokeh.
The dust-proof and weater resistant quality of the HD PENTAX-DA ★ 16-50mm F2.8ED PLM AW provides exceptiional performance even in the most demanding shooting conditions — in rain or mist, or at locations prone to splashing water.
Pentax's orginal, Super Protect coating (SP) is applied to the front element of the lens to ensure oil, dust, moisture droplets are minimized and can be easliy revmoved.
With a minimum focusing distance of 0.3m, the HD PENTAX-DA ★ 16-50mm F2.8ED PLM AW lens offers flexibiity in a variety of shooting situations, such as everyday snapshots, landscapes, close-ups, etc.
The conveinent Quick shift focusing system allows for AF fine tune adjustment without removing the lens from its Auto Focus setting
Enhance KAF4 Electromagnetic diaphram control, Compatible with PENTAX K-3 Mark III, K-3 II, K-3, KP, K-70, K-50, K-S2, K-S1, K-1 Mark II, and K-1. Please update the firmware to the latest version to properly use. When mounted on K-1 Mark II and K-1, images can be captured only in crop mode because the camera's image circle is exclusively designed for APS-C format.
[What's in the box] Lens body, lens hood PH-RBN77, lens cap O-LC77, lens case HS120-150, lens mount cap K.
Specifications
Focal Length
16–50mm (24.5–76.5mm equivalent in 35mm format)
Maximum Aperture
f/2.8 (constant)
Diaphragm Blades
9 (circular)
Optical Elements
Includes ED glass, anomalous dispersion glass, and ED aspherical elements
Minimum Focusing Distance
0.3m
Autofocus System
PLM (Pulse Motor)
Mount
KAF4 (Pentax K-mount)
Weather Sealing
AW (All-Weather)
Front Element Coating
SP (Super Protect) + HD multi-coating
Compatible Bodies
Pentax K-3 Mark III, K-3 II, K-3, KP, K-70, K-50, K-S2, K-S1, K-1 Mark II, K-1 (crop mode)
In-Box Contents
Lens body, hood PH-RBN77, cap O-LC77, case HS120-150, mount cap K
Pros & Cons
👍 Pros
- Constant f/2.8 aperture across the full 16–50mm range maintains consistent exposure and shallow depth of field at every focal length.
- PLM autofocus is fast and near-silent, making it unobtrusive during quiet events, ceremonies, and portrait sessions.
- AW weather sealing with SP-coated front element allows shooting confidently in rain, mist, and dusty outdoor conditions.
- Nine-blade circular diaphragm produces smooth, rounded bokeh that renders background light sources as soft circles rather than polygonal shapes.
- Quick-Shift focus override lets you make manual corrections without switching focus modes, speeding up portrait and close-up work.
- 0.3m minimum focus distance adds close-up flexibility for detail shots without requiring a macro lens.
👎 Cons
- APS-C only — on Pentax full-frame K-1 bodies it forces crop mode, limiting the resolution and angle of view available from those sensors.
- At 16mm and f/2.8, some vignetting is visible in corners wide open — common for this class of lens but worth knowing for architectural interiors and flat-lit subjects.
- Size and weight are substantial for an APS-C kit — noticeably heavier than slower kit zooms, which adds fatigue during all-day event coverage.
- The KAF4 mount limits this lens to the Pentax K ecosystem — shooters considering a system switch cannot carry this investment to another brand.
- Requires firmware update on K-1 and K-1 Mark II for full compatibility — a minor but non-obvious setup step.
Frequently Asked Questions
Which Pentax camera bodies is this lens compatible with?
This lens uses the KAF4 mount and is compatible with Pentax K-mount APS-C DSLRs including the K-3 Mark III, K-3 II, K-3, KP, K-70, K-50, K-S2, K-S1, and full-frame K-1 Mark II and K-1 — though on the full-frame bodies it operates only in crop mode since the image circle is APS-C sized. Firmware should be updated to the latest version before use.
How does the PLM autofocus perform for moving subjects?
The PLM (Pulse Motor) drives a lightweight, purpose-designed focus group that acquires focus quickly and near-silently. For event coverage and moderate-pace portraiture it's responsive and practical. It's not a phase-detect mirrorless system, so continuous tracking on fast action is less assured, but for its intended use cases — events, reportage, environmental portraiture — the speed is genuinely useful.
Does the f/2.8 aperture hold across the full zoom range?
Yes. The f/2.8 maximum aperture is constant from 16mm through 50mm — you don't lose a stop at the long end as you would with a variable-aperture zoom. This makes it reliable for consistent exposure during a zoom shot or when moving between focal lengths mid-event.
How does the AW weather sealing work in practice?
All-Weather (AW) construction means seals are present at critical lens body joints, the zoom ring, and the mount. Combined with the SP-coated front element that repels moisture and dust, this lens can be used in light rain, mist, and dusty outdoor environments without covering it — a real advantage for outdoor event work and landscape shooting. It is not rated for submersion.
Can I manually override focus after autofocus locks without flipping a switch?
Yes. The Quick-Shift Focus System lets you rotate the focus ring to fine-tune or override focus immediately after the AF system locks, without switching from AF to MF mode — useful for portrait work where you want to confirm focus on the near eye after the camera locks on the face.
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