You may also find that the viewfinder image at 10fps isn’t quite responsive enough for following fast or erratic subjects, but there’s an 8fps ‘live view’ mode that offers a faster, more stable viewfinder image. One criticism of previous models is that once the buffer is filled you can’t use the camera menus until it’s cleared – but Sony has fixed that with the A7 III. This is where the Sony A7 IV scores – it beats the A7 III's resolution with 33 million pixels, and while the 10fps burst rate is the same, the newer camera has a practically unlimited raw buffer depth with a fast memory card – amazing. It's capable of capturing up to 177 JPEGs, 89 compressed Raw files or 40 uncompressed Raw images in a single burst. High-speed shooting isn’t much good without a buffer capacity to match, and while the A7 III can’t compete with sports specialists like the Canon EOS-1D X Mark III, Nikon D6 or the Sony A9 II, it has a bigger buffer than the average enthusiast camera. The end result is much improved noise and high ISO performance, high-quality 4K video and that impressive 10fps continuous shooting speed – double the speed of the previous A7 II. It’s not the same sensor as before, however this one has a back-illuminated design for improved light-gathering, and is teamed up with a front-end LSI and BIONZ X processor that produce much faster data readout and processing speeds than before. Resolution is probably the first thing camera buyers look for, and it's perhaps this camera’s most unremarkable specification. Just like its predecessors, the A7 II and the A7, the A7 III has a 24MP sensor. Weight: 650g (with battery and memory card).Max burst: 10fps (177 JPEGs, 89 compressed RAW, 40 uncompressed Raw).LCD: 3in tilting touchscreen, 921,600 dots.Memory card: 2x MS/SD/SDHC/SDXC (1x UHS-II).Viewfinder: XGA OLED type, 2,359,296 dots.Video: 4K UHD at 30/24fps, Full HD at up to 120fps.AF points: 693-point phase-detection AF / 425-point contrast-detect AF.Sony model number: ILCE-7M3 (body only), ILCE-7M3K (with 24-70mm).It's also an entry point into Sony's now- formidable E-mount mirrorless camera system. For an asking price of around £2,000/£1,600 or less, the A7 III is probably Sony’s most compelling DSLR alternative – and not just for professionals, but keen enthusiasts too. Sony really stirred up the professional full-frame camera market with its A-series mirrorless cameras, luring many pros away from Canon and Nikon DSLRs into the brave new world of mirrorless imaging. The new Canon EOS R6 is another strong rival, of course, but this camera has a higher price tag and a lower resolution 20-megapixel sensor. Things have moved on since then, with the arrival of the Nikon Z6 II, Panasonic Lumix S1 and Lumix S5, so the Sony A7 III is up against cameras just as good or better, but still has a lot it its favor. At the time of its launch the A7 III was unmatched by any rivals.
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