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HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review

Gary Wolstenholme reviews the new wide-angle zoom lens from Pentax, the HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR.


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Handling and Features
Performance
Verdict
Specification

HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: DA16 85 Front Copiejpg 1414658583

This 5.3x standard zoom lens provides an angle of view roughly equivalent to a 24-130mm range on a 35mm format camera and it sports weather resistant construction. In this review, we'll take a look at how this lens performs.

HD Pentax-DA 16-85mm f/3.5-5.6 ED DC WR Handling and Features

HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: DA16 85 Wide A Copie 1414658619

The build quality of this lens is very good indeed, with it being mostly constructed of high-quality plastics, a metal bayonet mount and a wide, rubberised zoom ring. It sports a weather and dust resistant construction and weighs only 488g. As a result, it balances very well with the Pentax K-3 body used for testing.

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As focusing is performed internally, the filter thread does not rotate, which makes it perfect for use with polarising and graduated filters. A petal-shaped hood is supplied with the lens that attaches to the front via a bayonet fitting.

HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: DA16 85 Tele With Hood A Copie 1414658605

The narrow manual focusing ring doesn't rotate during auto-focus and manual adjustments can be applied at any time. Manual focusing action is smooth and there is enough damping to make applying adjustments easy. Autofocus is reasonably quick, but maybe not as fast as some lenses sporting silent focusing motors. The minimum focus distance of 35cm is quite close for a lens of this type, allowing for frame filling close up images.
HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: Pentax Lens 1414658630
 

HD Pentax-DA 16-85mm f/3.5-5.6 ED DC WR Performance

At 16mm, sharpness is already outstanding in the centre of the frame, with performance towards the edges falling just short of excellent levels. Stopping down to between f/5.6 and f/8 results in excellent sharpness across the frame at this focal length.

Zooming to 35mm and maximum aperture, sharpness is outstanding in the centre of the frame, with performance towards the edges of the frame falling to very good levels. Clarity in the centre remains constant between maximum aperture and f/8, with performance improving steadily to outstanding levels towards the edges of the frame.

Finally, at 85mm, sharpness remains excellent in the centre and very good towards the edges at maximum aperture. Stopping down to f/8 results in a slight improvement in sharpness towards the edges.

HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: MTF@16mm
MTF@16mm
 
HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: MTF@35mm
MTF@35mm
 
HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: MTF@85mm
MTF@85mm
 

How to read our charts

The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges. Averaging them out gives the red weighted column.

The scale on the left side is an indication of actual image resolution. The taller the column, the better the lens performance. Simple.

For this review, the lens was tested on a Pentax K-3 using Imatest.

Chromatic aberrations are fairly well controlled with fringing just exceeding one pixel width towards the edges of the frame at 16mm and maximum aperture and stopped down to f/22 at 16mm and 85mm, which may become visible, especially in images containing areas of high contrast.

HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: CA@16mm
CA@16mm
 
HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: CA@35mm
CA@35mm
 
HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review: CA@85mm
CA@85mm
 

How to read our charts

Chromatic aberration is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software.

Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimise the problem, hence they usually cost more.

For this review, the lens was tested on a Pentax K-3 using Imatest.

Falloff of illumination towards the edges is typical for a lens of this type. At 16mm and f/3.5, the corners are 1.67 stops darker than the image centre and at 85mm the corners are only 0.846 stops darker than the centre. Visually uniform illumination is achieved with the aperture stopped down to f/8 or beyond throughout the zoom range.

Distortion is also typical for this kind of lens, Imatest detected 3.65% barrel distortion at 16mm, which is replaced by 0.834% pincushion distortion at 85mm. The distortion pattern is uniform across the frame, which should make it relatively easy to apply corrections in image editing software afterwards if absolutely straight lines are necessary.

During testing, this lens proved itself very resistant to flare and contrast levels are good, even when shooting into the light. The petal-shaped hood does a decent job of shading the lens from extraneous light that may cause issues.

Pentax HD PENTAX-DA 16-85mm F/3.5-5.6ED DC WR Sample Photos

Value For Money

Being priced at around £499, this lens is priced roughly in line with similar offerings from other manufacturers for their own camera systems. The closest equivalent from third party manufacturers is Sigma's 17-70mm f/2.8-4, which costs around £330, this lens isn't as telephoto, or wide, but does sport a faster maximum aperture throughout the zoom range.
 

HD Pentax-DA 16-85mm f/3.5-5.6 ED DC WR Verdict

Although the on-paper specification of this lens may not set the world on fire with excitement, this lens delivers excellent levels of sharpness, handles well, focuses reasonably quickly and is reasonably priced. As a result, it should win over many fans amongst Pentax camera users.

HD Pentax-DA 16-85mm f/3.5-5.6 ED DC WR Pros

Excellent sharpness throughout the zoom range
Weather and dust resistant construction
Good build quality
Fast focusing
Full-time manual focus override
Close focusing

HD Pentax-DA 16-85mm f/3.5-5.6 ED DC WR Cons

CA levels a little on the high side

FEATURES  
HANDLING  
PERFORMANCE  
VALUE FOR MONEY  
VERDICT  

HD Pentax-DA 16-85mm F3.5-5.6 ED DC WR Review:

The Pentax-DA 16-85mm f/3.5-5.6 ED DC WR gives excellent sharpness and is weather and dust resistant.

 

Pentax HD PENTAX-DA 16-85mm F/3.5-5.6ED DC WR Specifications

ManufacturerPentax
General
Lens Mounts
  • Pentax KAF3
Lens
Focal Length16mm - 85mm
Angle of View19° - 83°
Max Aperturef/3.5 - f/5.6
Min Aperturef/22 - f/38
Filter Size72mm
StabilisedNo
35mm equivalent24.5mm - 130mm
Internal focusingYes
Maximum magnificationNo Data
Focusing
Min Focus35cm
Construction
Blades7
Elements16
Groups12
Box Contents
Box ContentsLens Hood PH-RBA72 38710, Lens Cap O-LC72 31520, Lens Case S90-140 31006
Dimensions
Weight488g
Height94mm

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Comments

spidermario Avatar
3 Oct 2019 11:24PM
If you still have the numbers at hand, would it be possible to change the MTF plots (is that MTF50?) from an “excellent/good/fair/poor” scale to actual LW/PH numbers (or make them available via other means)?

Thanks.
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