Battle of the super wides
it is a very good match-up. a very good m43 (imho a very close 2nd in iq to the pana 7-14 which is nearly the only competition in the m43 very wide category) lens against a ff 3rd-party lens which i used to use on an f3 and an n90s myself. if the oly lens was on the omd-em5 i'd give that combo the nod over the tokina on any nikon ff body using period film.
The world is going to pieces and people like Adams and Weston are photographing rocks! ~Henri Cartier-Bresson