Some image samples here just to show how the lens performs on the A7, nothing artsy . The images benefit in general from Lightroom's defringe but I did not apply that to the files here so you can see for yourself that purple fringing is relatively mild. My fellow pixelpeepers can click on an image to see the full-res version, EXIF available. At f/8. Sharpness extends nicely to the edges. At f/8 again. Some slight purple fringing can be seen around the weathercock stand and check out foreground bokeh which looks OK to me. At f/11 with a 28mm extension ring, at about 2.5m. The lens focusses only to 4.5m on its own. Brick wall at f/11 with 28mm extension ring as close as it'll go, center crop. Same picture, lower-right corner crop. A bit fuzzy in the extreme corner but still quite useable IMHO. At f/8, check foreground bokeh. At f/8 and 4.5m (no extension ring). Flowers in the lower right corner are sharp, check background bokeh upper left. Crazy "winter", in The Netherlands we didn't have a single night in December with frost, so here and there some flowers stay or re-emerge.