When it comes to shooting at an event as important as a wedding, two things about a lens are paramount: low-light performance and the ability to isolate focus on the bride. A big aperture will help you with both requirements. This premium-quality lens has a light-gathering f/2.8, 9-bladed aperture, for soft, smooth out-of focus backgrounds that make your foreground subject leap to life. With a zoom range that extends from portrait length to medium-long telephoto, you'll be able to capture candid moments from a distance as the sun goes down. Weather-resistant, dust-resistant construction makes this lens the perfect companion to the Pentax K-5 weather-resistant digital SLR. Between the two, you'll have a combo that's built for bringing home the elusive shot under challenging circumstances.
Aspherical glass elements, plus special Pentax coatings, make your images as sharp and artifact-free as they can be. The Quick-Shift focus system allows instant on-the-fly switching from auto to manual focus.