One of the myths of M43 is that the sensor is so small that you can’t really get out-of-focus areas. In the kingdom of bokeh, medium format is king, followed by full-frame/35mm, APS-C, M43.
Truth told, I was skeptical as well when I first got the camera, particularly shooting with the 14-140. The 20mm F1.7 does a nice job of blurring the background, particularly with creating a 3-D effect at certain distances and apertures. But I held out little hope for the zooms.
But I’ve been proven wrong. One of the reasons that I go to The Online Photographer regularly is that I learn things. And one of the things the Mike Johnston taught me is that sensor size is the least important factor in DOF. Most important is camera to subject distance vs. camera to background distance, as this photo shows.
So, a relatively slow zoom can give you pleasing OOF under certain conditions. Good to know…