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Pentax HD-DA 16-50mm f/2.8ED PLM AW Lens

BH #PE165028 • MFR #28030
Pentax HD-DA 16-50mm f/2.8ED PLM AW Lens
Key Features
  • K-Mount Lens / APS-C Format
  • 24.5-76.5mm (35mm Equivalent)
  • Aperture Range: f/2.8 to f/22
  • Extra-Low Dispersion Glass
This dynamic HD-DA 16-50mm f/2.8ED PLM AW Lens from Pentax is a classic wide-angle to portrait-length zoom lens with a constant f/2.8 aperture through the entire zoom range that delivers optical performance and is an ideal regular-use lens. It incorporates a newly designed optical system and an advanced Pulse Motor (PLM) to assure smooth, high-speed, and high precision autofocus operation with minimized noise. It has been fine-tuned for greater operability in manual-focus operation and includes a quick-shift focus system to provide an instant shift from auto to manual. An electromagnetic diaphragm control mechanism assures high precision exposure control and smooth focus tracking when used in combination with compatible digital SLR cameras and also enables the capture of video clips using automatic exposure control, even when there are considerable differences in brightness. It delivers exceptionally high resolving power and outstanding contrast even at open aperture, while capturing beautiful images with a smooth transition of the bokeh effect and a true-to-life depth of field.
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Pentax DA* 16-50mm f/2.8 ED PLM AW Overview

  • 1Description
  • 2Constant Aperture
  • 3High-Speed Autofocus
  • 4Optical Design
  • 5Lens Coatings
  • 6Rounded 9 Rounded Blade Diaphragm
  • 7Dustproof, Weather Resistant Construction

This dynamic HD-DA 16-50mm f/2.8ED PLM AW Lens from Pentax is a classic wide-angle to portrait-length zoom lens with a constant f/2.8 aperture through the entire zoom range that delivers optical performance and is an ideal regular-use lens. It incorporates a newly designed optical system and an advanced Pulse Motor (PLM) to assure smooth, high-speed, and high precision autofocus operation with minimized noise. It has been fine-tuned for greater operability in manual-focus operation and includes a quick-shift focus system to provide an instant shift from auto to manual. An electromagnetic diaphragm control mechanism assures high precision exposure control and smooth focus tracking when used in combination with compatible digital SLR cameras and also enables the capture of video clips using automatic exposure control, even when there are considerable differences in brightness. It delivers exceptionally high resolving power and outstanding contrast even at open aperture, while capturing beautiful images with a smooth transition of the bokeh effect and a true-to-life depth of field.

Developed as an AW (All Weather) model, this zoom lens features a dustproof, weather-resistant construction to prevent the intrusion of water and dust particles into the lens interior. The Super Protect lens coating keeps the front surface free of dust and stains, so it performs superbly even in the most demanding shooting conditions, in rain, mist, or at locations prone to splashing water.

Constant Aperture
The bright f/2.8 maximum aperture remains constant through the entire zoom range for image consistency.
High-Speed Autofocus
The advanced Pulse Motor (PLM) assures smooth, high-speed, and high precision autofocus operation with minimized noise. The Quick-Shift Focus System provides an instant shift to manual-focus operation, after locking the subject in focus during AF operation by pressing the camera's shutter-release button halfway down; this system can be used at any time during AF operation. The lens also has effortless manual-focus operation, with limited lens extension during focusing between the minimum focusing distance and infinity and optimum focus-ring torque.
Optical Design
With a lens design of 16 elements in 10 groups, the newly designed optical system features a lighter, more compact focus-lens group. The design incorporates one ED (Extra-low Dispersion) glass optical element, one anomalous glass optical element, and two ED (Extra-low Dispersion) aspherical glass optical elements to effectively reduce chromatic aberration to a minimum over the entire zoom range. The redesigned focus mechanism provides a minimum focusing distance of just 11.8".
Lens Coatings
The lens elements are coated with multi-layer HD Coating, which reduces the average reflectance in the visible ray spectrum to less than 50% of conventional multi-layer coatings, effectively minimizing flare and ghost images even in demanding lighting conditions such as backlighting. In addition, an SP (Super Protect) coating keep the lens front surface free of dust and stains.
Rounded 9 Rounded Blade Diaphragm
Nine-blade circular diaphragm to produce a natural, beautiful bokeh (defocus) effect (from open aperture to F5.6 in the wide-angle range; from open aperture to F8 in the telephoto range), while minimizing the streaking of point light sources. This zoom lens features an electromagnetic diaphragm control mechanism* to assure high-precision exposure control when used in combination with compatible digital SLR cameras. It also lets the user capture video clips using automatic exposure control, even when there are considerable differences in brightness during the video shooting.
Dustproof, Weather Resistant Construction
Developed as an AW (All Weather) model, this zoom lens features a dustproof, weather-resistant construction to prevent the intrusion of water and dust particles into the lens interior. By pairing it with a PENTAX dustproof, weather-resistant digital SLR camera body, the user can create a highly durable, reliable digital imaging system that performs superbly even in the most demanding shooting conditions, in rain, mist, or at locations prone to splashing water.
UPC: 027075302952

Pentax DA* 16-50mm f/2.8 ED PLM AW Specs

Focal Length16 to 50mm (35mm Equivalent Focal Length: 24.5 to 76.5mm)
Maximum Aperturef/2.8
Minimum Aperturef/22
Lens MountPentax K
Lens Format CoverageAPS-C
Angle of View83° to 31.5°
Minimum Focus Distance11.8" / 30 cm
Maximum Magnification0.24x
Optical Design16 Elements in 10 Groups
Diaphragm Blades9, Rounded
Focus TypeAutofocus
Filter Size77 mm (Front)
Dimensions (ø x L)3.3 x 4.6" / 84 x 117 mm
Weight1.6 lb / 712 g
Packaging Info
Package Weight2.86 lb
Box Dimensions (LxWxH)8.8 x 7.6 x 5.6"

Pentax DA* 16-50mm f/2.8 ED PLM AW Reviews

Big Improvement

By Mark
Rated 5 out of 5
Date: 2022-11-01

I have had both versions of the 16-50 DA*. When the new PLM version came out I had to try it. I had used the previous SDM version for years and had multiple lenses where the auto focus eventually failed after about 4-6 months of use (even after repair). The SDM auto focus, when working, was also slow and not very accurate. Only about 60-70% of images were in good focus. I have used my new PLM version for about 9 months now with no issues. The new motor is much faster, and the auto focus is much more accurate. I have it paired with the K-3 III and am very happy with the image quality. Hopefully it will stand the test of time as it is one of my most used lenses.

A total home run....if you know what to expect

By Robert
Rated 5 out of 5
Date: 2021-11-05

Just got this and am knocked out by the quality of the images, at all focal lengths.......sharp, crisp with almost no distortion..... Is this a low weight plastic affair?....No.....This is a full size constant aperture with the best materials. That adds weight and size. If you know this and want super images....this is a great choice........ BTW...as far as the zoom only going to 50MM...you add a lot of weight and size to go beyond that...the laws of physics have not been repealed....and we can all just crop a 50mm image to get most of what we want....... (Finally, stay away from F22...this is good advice for all zooms)...

Fantastic Lens, Almost Macro

By Jordana
Rated 5 out of 5
Date: 2022-05-15

I thought really long and hard before purchasing this lens. I have a pretty full line up of fill frame Pentax * pro quality lenses for my K1MarkII. When I decided to purchase the new K-3 Mark III I fully intended to just stick with those lenses. They are all outstanding glass and I didn't really think I needed another lens. After reading about how this lens is made with new technology to optimize the capability of the K-3 Mark III, I decided it would be worth testing out the hype. On top of that, I intend to carry this combo backpacking and because I was using FF lenses on the smaller sensor, I didn't have a good wide angle lens any longer unless I wanted to use the FF camera. To say I am impressed is an understatement. I enjoy macro photography and in my testing I found I could get very close to my subjects and still have accurate focus. Even with small insects you can end up with a really neat photo, especially if you happen to use a flash to freeze motion. When it comes to wide angle, I was extremely impressed with the edge-to-edge rendering. Not only does this lens reproduce what your eye sees with impressive accuracy, it provides quick and accurate focusing and crystal clear image lines. The build quality is excellent. The lens is heavy and I admit I am not looking forward to carrying it for 100+ miles, but to me the image quality supersedes the weight. I was looking hard at going to a Sony A1 mirrorless body and lenses and, after looking at the weights and quality, I realized what I had was pretty much the same and purchasing this lens to complete my kit was a lot less expensive in the long run. I have dropped another of my Pentax lenses (built much like this one) and even with a cracked housing and bent extension tube the lens functioned. When hiking, that is the kind of lens you need on your camera. It is bound to hit a rock or drop somewhere along the way and want it to still work when all is said and done. I feel this lens will do just that. The function is smooth and accurate. I don't find the focus or zoom to wander even in manual settings. It is tight and quiet. The lens communicates flawlessly with the camera and this pairing is my absolute favorite. It has become my go-to for pretty much everything, I just use my feet if I need to be closer to a subject. Because it is so accurate and capable at close ranges, I don't even feel I need the heavy long zoom lenses unless I am shooting wildlife over distances. In the attached photos there is an unedited wide angle shot and a heavily cropped, only sharpened, handheld insect shot without flash. The insect shot is what most impressed me, I have never gotten another lens not designed to be a macro to be this accurate, especially without a flash. Just really, really impressed.

More than utility

By Russell
Rated 5 out of 5
Date: 2021-12-18

I have had this lens for about a month and still learning its capabilities. It produces photos with great IQ and the color rendition is phenomenal (as is with most Pentax glass). Focus is fast and accurate. Practically speaking, I've used it for sports and most recently portraits. I'm really looking forward to more outings and sessions as I learn adjust to the capabilities this lens provides. I'll let the portrait images attached speak for the lens.

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Date published: 2022-04-30
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