Over the past year I have been moving very slowly towards M4/3 in my wedding photography. I tend to use M4/3 for getting ready and pre-ceremony pics. I like the sharpness and tone as well as the weight. Here are some examples. But once the reception lights go down I do still use my Nikon D750 and D610 for faster focus in low light. I am using C1 to develop raw and sharpen in post using Nik. The examples are EM10 and Oly 25mm 1.8 with macro adapter 02, then EM1s with Panasonic 35-100mm and 12-35mm.