The Sony A7R IV is a high-resolution, full-frame, mirrorless camera with an even higher resolution of 61MP over the A7R III's 42MP. The body also has a dynamic range of 15 stops and a Fast Hybrid AF system with 567 phase-detect and 425 contrast-detect AF points. The body is suitable for applications that demand very high resolution in well-lit situations such as studio shoots, ad shoots and landscapes.