Unlike other lenses in this group, the Pentax lacks an internal focus system. It therefore extends in physical length as you decrease the focus distance towards its minimum setting. On the plus side, it’s only two thirds of the length of most 100mm macro lenses at its infinity focus setting, and only a millimetre longer than the Olympus 60mm MFT lens.
As is typical of high-end Pentax lenses, this model is well-built. It features an aluminium outer barrel, a comprehensive set of weather seals and a protective coating on its front element to repel muck and moisture. However, the finery doesn’t stretch to an internal autofocus motor. Instead, the lens relies on a screw-drive from the host camera body.
Performance
Although quite small, the manual focus ring operates with precision,…
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Teach Yourself Macro Photography (Digital) - 1 Issue, Teach Yourself Macro Photography