It feels like rumours of the a7SIII’s arrival were lightyears ago, but Sony have finally officially announced its newest video centric full-frame mirrorless camera. The new model was always going to make big strides over the a7SII it replaces, but just how much the camera range has improved became clear when Sony shared the specifications with the world.
Headline features include a newly-developed BIONZ XR image processing engine. Which Sony explains has eight times more processing power than its previous version, which is paired with a new 12.1-megapixel back-illuminated full-frame Exmor R CMOS sensor, which Sony also reports significantly reduces rolling shutter, which can present a problem when the camera is moved quickly during filming.
Thanks to that powerful image processing engine, the a7SIII features a vast ISO range that can be expanded all the way from ISO 40 to ISO 409,600, with the higher figure sure to interest astrophotographers who want to capture subjects like the Aurora in the night sky. This is accompanied by a vast dynamic range, with Sony explaining the a7SIII delivers 15+ stops of dynamic range for movies.
The a7SIII has also seen an improvement to its autofocus set up, with a new ‘Fast Hybrid’ system that offers photographers and videographers 759 phase-detection AF points that cover 92% of the image sensor. What’s more, the a7SIII includes Sony’s acclaimed Real-time Eye AF for both stills and video shooting.
Sony’s are well-known for their IBIS (In Body Image Stabilisation) technology and the a7SIII keeps up this trend, offering a 5-axis system that help users capture steady shots and the a7SIII is also the first Sony E-mount body to feature a side-opening vari-angle rear screen, which is also touch-sensitive.
Although the Sony a7SIII can’t match the new Canon R5 and shoot 8K, it does serve up in-camera 4K up to 120p, meaning epic slow motion sequences will be able to be captured at ultra-high resolutions. What’s more, Sony has been keen to stress how well the a7SIII controls its temperature and explained that the new Sony can shoot 4K 60p 10-bit 4:2:2 video recordings lasting an hour or more.
What’s more, the a7SIII offers a variety of recording modes, including All-Intra and MPEG-H HEVC/H.265 coding (XAVC HS). The new camera also features Sony’s three colour gamut settings S-Gamut, S-Gamut3, and S-Gamut3.Cine, enabling videographers to easily match footage shot on the A7S III with movies shot on Sony’s pro camcorders such as the FS5.
Other features include the ability to shoot stills at 10 frames per second for more than 1,000 consecutive uncompressed RAW images, dual SD/CFexpress Type A card slots, a battery capable of 600 shots on a single charge and, in a move that is sure to get a cheer from Sony shooters, a revised Menu system. Available from September, the Sony a7SIII carries a price-tag of $3,499/£3,799.