With the new Sony a7r IV, Sony is pushing the company’s ability to get higher resolution images at the APS-C level.

We know this could sound a little insane, but if you look at how the photography world is playing out, we could be seeing the end of APS-Cvery soon. As it is, there isn’t much of a reason to purchase an APS-C DSLR camera over a mirrorless camera. From Sony’s presentation, we were able to gather what Sony is touting at the APS-C level despite the Sony a7r IV being a full-frame mirrorless option.
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https://www.thephoblographer.com/2019/07/25/is-this-sony-a7r-iv-feature-signaling-the-end-of-aps-c-cameras/