Sigma's latest addition to their new lens lineup, the 17-70mm f/2.8-4.0, became available for purchase today from B&H. Along with the release, Sigma published a preview of what you can expect from the lens in terms of performance. If it is up to snuff, it will be a great option for those in the market for a wide-angle APS-C lens.
This lens is a definite plus for APS-C shooters even though it has a variable aperture (a trait of which I am traditionally never a fan). We are working on our review and will let you know our thoughts as soon as they're coherent. In the meantime, what do you think of the performance? For more samples and larger resolution images, make sure you head over to Sigma's blog.