Panasonic Lumix DC-S1 vs Sony a7C — Which Is Better?

The Panasonic Lumix DC-S1 and the Sony a7C are both full-frame mirrorless cameras, but they take opposite approaches to body design. The S1, released in 2019, is a large 149 x 110 x 97 mm body weighing 899 g, built around the Leica L mount. The 2020 a7C packs a full-frame sensor into 124 x 71 x 60 mm and 509 g on the Sony FE mount.

That size and weight gap drives the choice between them. The a7C suits travel, hiking and everyday carry where a small full-frame body matters, while the S1's larger frame favours tripod or fixed-base shooting over a shoulder bag.

Both cameras share a 24.2 megapixel CMOS full-frame sensor, so distant wildlife crops and big landscape prints get the same freedom from either body. In-body stabilisation is shared too, steadying handheld work on both.

The a7C offers 693 autofocus points against the S1's 225, many more positions for placing focus. The S1 answers with a 5,760,000-dot viewfinder against 2,360,000 dots and a 1/8000 second top shutter against 1/4000, which keeps wide apertures usable in bright daylight. Burst rates stay close at 10 fps and 9 fps, and the native mounts, Sony FE and Leica L, decide which lenses you buy.

The S1 is the stronger choice for slow motion, with a maximum video frame rate of 60 fps against 30 fps on the a7C. The faster setting plays back at half speed, stretching fast action in the edit. Both cameras cap their maximum video resolution at 4K.

The a7C counters with a built-in intervalometer for timelapse, which the S1 does not have, so sunset or cloud sequences need no external timer. Files come out as XAVC S on the Sony and MP4 on the Panasonic.

The S1's rear screen is the better tool for checking focus and detail on location: a 3.2-inch, 2,100,000-dot LCD against the a7C's 3-inch, 921,600-dot panel. Both screens are touch-enabled and articulate for waist-level or selfie framing.

The two cameras also share weather sealing, Wi-Fi and Bluetooth for wireless transfer, live view, and support for an external flash. Neither body offers GPS tagging or a built-in flash, so geotagging and fill light both need accessories.

The a7C holds a clear advantage for long days away from a charger, rated at 740 shots on its NP-FZ100 battery against 380 shots on the S1's DMW-BLJ31 under their respective test conditions. Both charge over USB, which helps when topping up from a laptop or power bank.

For storage, the S1 has dual card slots and accepts SD UHS-II and XQD cards, so a wedding or event shooter can split RAW and JPEG onto separate cards. The a7C has a single SD UHS-II slot, so capacity planning matters on long assignments.