In the mail today I received my new Olympus 45mm f/1.8 and the 4/3 - m4/3 adapter I ordered off ebay, now attached to my Rokinon 85mm f/1.4. As you can see, there is quite a size difference! <a href="http://s532.photobucket.com/user/madogvelkor/media/2013-07-15_16-40-10_472.jpg.html" target="_blank">http://i532.photobucket.com/albums/ee322/madogvelkor/2013-07-15_16-40-10_472.jpg" border="0" alt=" photo 2013-07-15_16-40-10_472.jpg"/></a> I haven't had a chance to really try them out yet, but I think I'll like both for their own purposes. The 85mm is definitely not something I'd want to walk around town with -- the thing feels like a brick. The 45mm is nice and petite though, and well balanced on the GX1.