I'm seriously considering getting this when it's released for my E-M1. I have no interest in the GM1. I have the 12-40/2.8, but if this thing is a sharp as they say it is, I reckon it will be a great match for the E-M1 when wanting to go light. The E-M1, Pana 12-32 & Oly 45/1.8 would make for a great little light walk around set up. I like the fact that it's tiny and starts at 12mm at the wide end. Will be every interested to see the pricing and evaluations of this new lens. Anyone else considering getting this lens?