Gets the job done for a great price. Requires skill to get good results.
2 December 2011
Summary: Using on a Canon 60D Definitely best for use as a Macro lens. Bought it with intention of using it as cheap, multipurpose, fast glass. Works great in brilliant sunlight, not as sharp in low-light. It gets the job done and at an extremely reasonable price. Works wonderfully for up-close video!
Summary: I like using this lens for all the times my family is sitting at the kitchen table or playing in the living room. It enables me to go without flash most of the time in those situations. However, it is also a very fine lens for those times when I want to be a "serious hobbyist.
Summary: Lens is fast and images are rendered sharp. Bokeh at f4 is just awesome. HSM motor really delivers and its quiet, really quiet. Love the weight on the lens and it sits proudly on my kx unit. Would recommend this lens to anyone who is looking for a good short tele range.
Summary: I got this lens just in time for a vacation. I ordered it one week before departing and arrived on time. During the vacation it hardly ever left my camera. You can find a very good review of this lens at Photozone (Google photozone sigma 17-70 pentax). Its findings were reflected well in my use.
Summary: I decided on the Sigma 17-70 because of the extra speed with the /2.8. While using it at this aperture though, you won't get the sharpest images. It's not so much a dof / focusing issue, but rather a softness which can be noticed when compared to my 50mm prime.
Summary: This is currently my favorite lens. Echoing the other reviewers, the range is perfect for a walkaround lens and a perfect sub for the kit lens. Solid construction; it's got some weight to it. Smooth focusing, and sharp images. Macro to boot (see photos I've posted).