This new 1.4 version of the weather sealed lens has something about the photo it creates I really like. The colors? Contrast? Not sure but I prefer the look over my Olympus 25mm 1.8. It just matches up perfectly with this camera. 90% of my photography is with either the 25mm on my EM5 and the incredible sigma 16mm 1.4 on my G9 I carry together in my Think Tank Photo Retrospective 6 Bag.