“Mr. Mills was using a Sony digital camera capable of capturing images at up to 30 frames per second. He took these photos with a shutter speed of 1/8,000th of a second — extremely fast by industry standards.”
https://www.nytimes.com/2024/07/14/us/politics/photo-path-trump-assassination.html
It was a good question. dynoman had the correct answer instead of a guess like mine.
https://freerepublic.com/focus/news/4254357/posts?page=20#20
There may be other images which show the projectile further away. We do not know how much the image was cropped or if other, less dramatic images exist.