The good stuff first. Build quality is good, even better than I expected. It's all plastic but feels solid, the focus ring is grippy and there's no unexpected movement in details. As for image quality, it all depends on what you want from a lens. This is a slow (f/6.3), 300mm m4/3 lens (2x crop factor). And it's a mirror glass. You get ring-shaped bokeh, extremely shallow depth of field, and a very sensitive focus ring that moves about 1/3 of a full turn. Even the slightest touch on the focusβ¦