Pentax has recently published a web page containing several sample photos from the new K-5 II and K-5 IIs. In addition, several comparative photos were showcased in Japan and have now been posted on the forum by members.
From the looks of it, the K-5 IIs does in fact have a tremendous advantage over the K-5 and K-5 II in terms of resolution. We plan on conducting detailed tests of this once the K-5 IIs hits the shelves, which should happen within two weeks. In the US, the K-5 IIs is available for pre-order for $1299, while the regular K-5 II is $100 cheaper. Considering that the original K-5 was launched at an MSRP of $1749, this pricing seems quite reasonable.
The Pentax K-5 II is an enhanced version of the original Pentax K-5, which was launched in late 2010 and is considered one of Pentax's most successful DSLRs. Of note in the K-5 II is an all-new SAFOX X autofocus system and a redesigned LCD with greatly-improved visiblity. The K-5 IIs is a special version of the K-5 II which lacks the antialiasing filter found on most digital cameras. This means that the K-5 IIs has the potential for much higher image resolution at the risk of exhibiting the Moiré pattern. Click here to read our in-depth Pentax K-5 review for an close look at the Pentax K-5.