Shooting low-light photos in ProRAW technically allows for greater flexibility in recovering underexposed shadow detail compared to standard JPEG files primarily due to differences in data capture, bit depth, and processing. ProRAW, a computational RAW format from Apple, combines the benefits of multi-frame image processing, like Deep Fusion and Smart HDR, with the extensive data retention of a traditional RAW file. A RAW file, in general, is the unprocessed, uncompressed data directly from the camera's image sensor, functioning like a digital negative. ProRAW captures this raw sensor data with a significantly higher bit depth, typically 10-bit or 12-bit, compared to a standard JPEG file which is always 8-bit. Bit depth refers to the number of discrete tonal values available for each color channel (red, green, blue). An 8-bit image has 256 possible levels per channel, resulting ....
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