Verdict
Pros
- Small, light and solid, high-resolution, high-contrast
Cons
- Chromatic aberration
Key Specifications
- Review Price: £349
This model comes from Pentax’s KB range, and the DA mark denotes its digital dedication. The lens construction consists of 13 elements in 10 groups and features aspheric elements together with a high-refractive, Extra Low Dispersion glass element. Together these elements help to maintain high-resolution, high-contrast images, while reducing chromatic aberration and promoting colour accuracy.
The lens has a metal outer barrel with a plastic inner barrel, which extracts as the zoom is moved towards the wideangle end. There’s a wide grooved zoom ring, while the manual focus ring is much narrower at the edge of the metal outer barrel. The focus scale is engraved on this barrel in front of the manual focus ring. Despite being one of the smallest and lightest of the lenses in this category, it feels pretty solid, though it lacks the professional feel of Canon and Nikon counterparts. With no high-tech drive motors, the AF is much noisier than others and while it’s slower it’s not problematically so even for fast-moving subjects – thanks mainly to the AF module built into the camera body.
Image Quality
In terms of sharpness the lens proves itself a contender by providing high resolution over 1000lwph. It also maintains this throughout the aperture and focal range. Optically this is as close to perfect consistency as we’d like to see, but with the wider angle comes increased fringing, with a rise of 3-3.5 pixels from centre to corner. This is a prime example of the difficulties still to overcome in providing wideangle optics for digital sensors, especially if you need to maintain a certain price point.
Sample images
Verdict
The lens provides high resolution, with just chromatic aberrations spoiling its performance
Trusted Score
Score in detail
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Value 8
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Design 9
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Image Quality 8
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Features 8
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Professional conduct
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Editorial independence
Editorial independence means being able to give an unbiased verdict about a product or company, with the avoidance of conflicts of interest. To ensure this is possible, every member of the editorial staff follows a clear code of conduct.
Professional conduct
We also expect our journalists to follow clear ethical standards in their work. Our staff members must strive for honesty and accuracy in everything they do. We follow the IPSO Editors’ code of practice to underpin these standards.
