Editor's Choice 2007: SLR Lenses

Here's a lens to match the specs and performance of the top-notch Pentax K10D digital SLR. First in a new series of high-performance DA* lenses that includes a well-matched 50-135mm f/2.8, the 16-50mm produces a focal length range equivalent to 24-75mm in the 35mm format, with the pro plus of an f/2.8 aperture that remains constant throughout its range. Like the K10D, this 15-element ED zoom is tightly sealed against water and dust, and its front element has a special topcoat that repels the elements. Put it on the K10D body and focusing (which goes to less than a foot) defaults to a smooth SDM-assisted AF. About $900.