In retirement, I've started a "second career" as a freelance writer/photographer, specializing in firearms subjects. Until fairly recently, I managed to struggle along with a K5 together with the FA 50mm 1.4 and the DA 18-135mm as my most used lenses for "product shots." However, with the purchase of a K3, I decided to get the SMC-DA 35mm macro Limited so that I could take full advantage of the sharpness of both the K3 and this lens, which has a great reputation. My primary criteria are sharpness and crisp color rendition.
I gotta tell you, the 35mm macro is now my "most used" lens, noticeably better in all respects than my previous lenses, with the added benefit of practically zero distortion. Here are some sample shots to illustrate how I use the lens, and the results. In downsizing, some sharpness was understandably sacrificed, but these may give you some idea of how I use the lens.
For my purposes, I couldn't ask for a better lens - it meets all my criteria, and then some. The macro capability is an added bonus, and I may take advantage of it at some point to illustrate tiny proof marks and other stamps on firearms. I'm a happy camper.
John
PENTAX : PENTAX Photo Gallery artist page