See my Pentax K1 wish list at B&H Photo.
A macro lens should perform at very high level in macro range, along with a flat field (strictly controlled field curvature). This finely detailed map was shot at a reproduction ratio of 1:10.2 to test just such a case.
SuperRes pixel shift mode (“SR-PSM”) of the Pentax K1 was used, for maximum image quality.
Image sizes up to 28 megapixels along with large crops provide a detailed look at the “whole package” (lens and camera).
Images up to 28 megapixels with large crops, all from f/2.8 through f/16.