PENTAX K-3 + SIGMA 17-70mm F2.8-4.0 DC MACRO HSM – Part 2 Posted on 27 March 2014 | 22:2727 March 2014 | 22:28 | No Comments Here is the First part of PENTAX K-3 + SIGMA 17-70mm F2.8-4.0 DC MACRO HSM Samples. Source 425 Posted in News.