Sony already makes full-frame mirrorless system cameras; Nikon and Canon recently revealed plans to do so; and now Panasonic has joined the party with its upcoming Lumix S1R and S1 models. Due to arrive 18th March, the Lumix S series models come with 35mm full-frame sensors (47MP for the S1R, 24MP for the S1), 4K recording at up to 60fps and dual image stabilisation (both world firsts on a full-frame mirrorless camera), and Leica’s L-Mount system, meaning it’ll be able to use 11 current Leica and Panasonic lenses. Panasonic says more full-frame glass is in the pipeline, including a brand new lens trio (50mm f/1.4, 70-200m f/4 and 24-105mm f4 macro) that will be available at launch. Neither model is cheap – the S1R will cost £3,399 body only, the S1 £2,199 – but that isn't likely to deter the sort of photo and video enthusiast they're aimed at. Look out for our reviews as soon as we can get our mitts on some samples.