Sony has dropped a bombshell, officially announcing the A7R IV mirrorless camera. Built around a newly developed 61-megapixel full-frame sensor, it is the highest-resolution full-frame camera now on the market — and the one to finally beat out the 50MP Canon EOS 5DSR from 2015. The new sensor offers about a 19-megapixel increase over the A7R III, but thanks to its backside-illuminated design, Sony says it still offers good low-light sensitivity and an impressive 15 stops of dynamic range.
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