Offering a high-dynamic-range CMOS sensor, a unique shake reduction system, and a rugged weatherproof body, the Pentax K-5 II and K-5 IIS are designed for the photographer who likes to get away from the crowd. We spent a little time comparing both cameras, and though we found them quite similar to their predecessors, that didn't keep us from exploring the various features, as well as the differences between the two models. The K-5 IIS, in particular, is designed to capture more detail thanks to its lack of an anti-aliasing filter, but there are pitfalls associated with that extra detail, which we explore in greater depth.