Panasonic has added the pancake the compact L-Mount kit was missing. The LUMIX S 20mm F2.5 (S-S20) is a full-frame ultra-wide prime at $499.99 / €499 / £429, due to ship in October 2026. Black is S-S20K at B&H; silver is S-S20S.
B&H Explora is selling it as a street-and-travel walkaround. The numbers back that up: about 142g without caps, 40.9mm from the front glass to the mount, φ69.4mm, 62mm filters. That is the same length and filter size as the S 40mm F2 and the 18-40mm F4.5-6.3 when the zoom is collapsed — one pouch, shared filters, S9-sized full-frame.