I'm looking for a small prime to go on my GM1 (just ordered a body) to have the combo always with me. I do not like the manual focussing on my 20mm f1.7, so I'm wondering how is the Oly 17mm f1.8 and 25mm f1.8 lenses for video with manual focus? Anybody got experience with these? I love my Voigtlabder 17.5mm on my GH3, but now I need a fast compact lens.