Why don’t photographers use a7r4?

Because Raw format files are too large, photos take up a lot of memory.

The Sony a7r4Raw format file is too large. The size of one photo reaches 120MB, and ten photos are 1.2GB. The result is that you need a faster and larger SD card, a 256 Sony A high-speed card costs almost 250 dollars, almost 2,000 yuan, so naturally you need to buy an additional mobile hard drive, or even upgrade the computer memory or change the laptop. Taking a notebook with 8GB of memory into account, it is not enough when processing R4 photos. You can only put together a puzzle of 5 pieces at most, and the computer will freeze if you add more.

The Sony a7r4 is a full-frame mirrorless camera released in July 2019. It uses a 61-megapixel full-frame sensor, which is currently the one with the highest pixels among full-frame cameras.