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Pentax couldn’t have picked a better day to release the newest addition to their line of Weather-Resistant lenses. Like its siblings, the 100mm macro has an aluminum barrel and simplified construction to keep water and mouisture out of the picture, literally. The lens istelsf sports a layer of Pentax’s SP (Super Protect surface caoting to “repel dust, water and grease and to minimize fingerprints.”

Pentax makes it clear that the lens is geared toward outdoors photographers, who will appreciate its 100mm focal length (153mm equivalent in 35mm format) and a working distance of a shade over five-inches. Other improvements include an upgraded focus ring for smoother manual focus and a completely rounded diaphragm bladefor natural bokeh. The Quick-Shift focus system is also worth noting for its ability to automatically switch to manual foct after autofocus has locked onto your subject. Anyone who has ever missed an up-close insect shot will almost certainly be able to appreciate that.

The lens starts shipping in January for $850, at which point Pentax DSLR owners will be heading out to take pictures in the rain. More specs after the jump.