The perfect complement to 20mm at the Pana Panasonic GX7. With the right camera settings sauscharf, subjects can be exempt prima and with Marumi Achromat succeed beautiful and tack-sharp macro. The Oly 45mm (also very good), I hardly use. Standard lens there to a sun visor and a padded quiver. The quiver can take a cushion, then, for example, adjusts the packed close-up lens with inside. Very nice, thank Sigma! The smooth surface looks used to, but has surprisingly good grip during focusing, even when wearing gloves. All in all, I find nothing to complain about (except that me a 100mm Sigma missing :-) - 5 star worthy.