With tried-and-tested goodness from Panasonic's G series cameras alongside a stunning new viewfinder, excellent video and a sound full-frame sensor, the S1 does much to impress. A huge body, however, along with some awkward controls and an autofocus system that's behind those on its peers, mean there's room for improvement.

Best-in-class viewfinder; Effective image stabilization system; High build quality and weather resistance; Excellent buffer depth; Hugely customizable; Superb video quality;

Large, heavy body; Handful of minor ergonomic issues; Focusing system lags behind rivals; Eyecup can get in the way of LCD; No DCI 4K, and V-Log is paid-for update

Panasonic has taken on Nikon and Canon with the launch of its new full-frame mirrorless ‘Lumix S1' (A$3,599) - its first digital single lens mirrorless camera t

Where other camera brands are just getting started with mirrorless, it feels like the Lumix S1 and S1R are more interested in pushing boundaries forward - and that's something that's easy to get on-board with.

Stellar ergonomics; Great results & expansive lens ecosystem

Autofocus not as fast as G9; Video record button placement not ideal

The Panasonic Lumix S1 is a full-frame mirrorless camera with 24 Megapixels, built-in stabilisation and 4k 60p video. it's one of two bodies launched by Panasonic as part of its new L-mount alliance with Leica and Sigma; the two new Lumix S bodies are differentiated by resolution with the S1...

Panasonic has taken its time announcing its first full-frame mirrorless cameras, entering the market a tad late. That time, though, has been well spent in making sure nearly everything about the Lumix S1 is perfect.

Best-in-class EVF; Solidly built with weather-sealing; Exceptional image stabilization; HLG Photo Mode; 4K video at 50/60fps; Near-perfect subject tracking autofocus; Easy-to-use menu system and control buttons

Power switch awkwardly positioned; Bigger and heavier than some rivals; V-Log available as paid-for firmware update

Mirrorless camera technology is no longer just about building lighter weight alternatives to DSLRs , but Panasonic is the first company to completely embrace this concept with its new full-frame Lumix S-series.

Best viewfinder on the market; Exceptional build quality; Very effective image stabilization; Excellent control layout and user interface; Great subject-tracking autofocus

Very big and heavy; DFD autofocus doesn't always work; Strong moiré in slow-motion video

I never thought I'd see a mirrorless camera bigger and heavier than a full-frame DSLR, but somehow Panasonic made it happen. And while there's a lot to like about Panasonic's entrants, the Lumix S1 and S1R -- novelties include a terrific high-resolution OLED viewfinder, HLG-tonemapped HDR photo, a triaxial tilt LCD and more -- the big body isn't among them.

And not just because they're crammed full of the latest tech.