Panasonic's S Pro standard prime — the Lumix S Pro 50mm f/1.4 for full-frame L-Mount.
The Panasonic Lumix S Pro 50mm f/1.4 was released in 2019 as one of the first lenses for Panasonic's full-frame Lumix S system, which uses the L-Mount shared with Leica and Sigma. It sits in the S Pro tier, Panasonic's higher-specification range certified to a Leica optical standard, and served as the standard fast prime at the system's launch.
This is an autofocus L-Mount lens with a 50mm focal length and an f/1.4 maximum aperture, built to Panasonic's S Pro specification with dust and splash resistance. It uses a linear focus motor and is a large, heavy standard prime, weighing over 900g. The filter thread is 77mm. It is designed for Panasonic's full-frame Lumix S bodies and works on other L-Mount cameras. Confirm the minimum focus distance and exact weight on the specific copy.
The f/1.4 aperture gives strong subject separation and low-light capability at a standard field of view, suiting portraits, events and general full-frame work. The lens is designed to hold sharpness from wide apertures and to suppress focus breathing and provide smooth aperture transitions for video, in line with the S Pro line's hybrid stills and video aim. Its size reflects the emphasis on optical performance over compactness.
On the used market this lens sells to Lumix S and other L-Mount users. Check that autofocus drives smoothly and quietly, and confirm the splash-resistant gaskets at the mount are intact. Inspect the large front element and 77mm filter thread for damage. Verify the lens reports correctly and that firmware is current on an L-Mount body. Given its weight, check the mount and barrel for any signs of a drop or stress at the lens mount flange.