Sigma 12-24mm f/4.5-5.6 MK II DG HSM Zoom Lens for Pentax DLSR Camera
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- Compatible with full frame digital SLRs
- Ultra-wide 12mm focal length
- FLD and SLD lens elements
- Fast and quiet autofocus
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The Sigma corporation is pleased to announce the new Sigma 12-24mm f/4.5-5.6 II DG HSM. One SLD and four FLD glass elements compensate for color aberration and provide high image quality. Three glass mold elements and one hybrid aspherical lens give advanced performance and compact and lightweight construction. The super multi-layer coating reduces flare and ghosting. This lens has superior peripheral brightness and provides sharp and high contrast images even at the maximum apertures. Incorporation of HSM (Hyper Sonic Motor) ensures quiet and high speed auto focus, while allowing full-time manual focus override. This lens has a minimum focusing distance of 28cm throughout the entire zoom range and a maximum magnification ratio of 1:6.4. In addition, this lens features splash proof design for use in harsh conditions.
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Most helpful customer reviews on Amazon.com
Update after a couple of months use:
I continue to be very happy with this lens, and have changed from 4 stars to 5 stars. Effective use of any wide angle lens can benefit from a technique tune up for composition and focus to avoid cartoon style exaggerated shots. But once you have some practice, getting a good shot can become second nature. I found that spending a bit more time composing during the first few weeks let me make sure the vertical and horizontal angles were not going to exaggerate elements of the scene, something that can be easy to mess up when subject elements vary in distance from the camera. Finding the right focus point can also sometimes be a bit tricky given the wide range of subject matter that can show up at different distances, so autofocus is not always the right answer. In some cases I have used manual focus to be sure I have the right focus point. The results are worth it. The flexibility of having this zoom range is a great feature.
I am glad I made the decision to buy this lens, and can recommended to others. Just keep in mind that this is going to take you into a new realm of photography and make a little time to adjust your technique accordingly.
The lens cap is a two piece system, you can use filters (say UV or polarizing) up to about 19 or 20 MM, if you go wider than that the secondary cap will start to become visible. Motor is quiet, weight isn't arm breaking given the size of the lens. Overall image quality is excellent.
If we were using it for more than B-Reel I might have gone with a Nikon lens, but for less than 1/2 the price this is an outstanding piece of glass to add to your bag