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Sony has launched the new A7R IV full-frame mirrorless camera. It's the successor to the popular A7R III and while not quite the flagship (that's still the A9) it represents the highest image quality that you can currently get from a Sony digital camera. The A7R IV bumps up the resolution from the A7R III's already impressive 42.4MP up to an incredible 61MP. According to Sony, this is the first 35mm full-frame back-illuminated CMOS image sensor with this resolution. The back-illuminated design will help reduce noise and increase sensitivity. The sensor boasts 15-stops of dynamic...