The lens arrived this afternoon. It's quite brassy and sassy on my K-1, and heavy. Took a couple of quick shots just for fun so no serious criticism, please! I'm looking forward to trying some portrait shots soon.
Here is a
link to my Flickr folder containing three shots, two with the F2.9 plate, one with F8. If you look at the largest version of the "vinegar F8" image at high magnification you can clearly see the offset lithography dots but not on the "vinegar F2.9" image due to the softness (as designed). I used Live View with 10x zoom for focusiing, with the vinegar bottle shots on a tripod and the dandelion shot handheld. No post on any of the shots except cropping. I realized after shooting that I had the K-1 set to Crop mode. Sorry.
Cheers