I have done some reading, and the latest I read is "...shooting at f/22 at f/15s, you could also shoot at f/11 at 1/60s- both exposures will give the same brightness". So I just do some testing with eg higer range of ISO with my tripod.
My findings show that they are almost the same brightness, but not exactly the same. Histrogram shifted and the size of the photo size also not the same.
Why is it different? Care to share your views?