In general, the lens is perfect. Sharpest at micro 4/3, like 20mm 1.7. Only the FR differ. 20 is more for people, 15 for street and landscapes. Although I still use two. Pros: - The highest sharpness across the frame with aperture 3.5; - Excellent color rendering; - Instant autofocus; - Pleasant and soft stroke of the focus ring, and in general, the assembly is clear, Japanese; - The presence of an aperture ring on the lens; - Convenient (for me) FR 30mm. With its cons. - After 20mm 1.7, the camera (GX7) no longer fits into the case :) - The price is a little high, even for BU they ask for almost 30k.