Daran wrote:
Eruditass wrote
Good list, though 2 is news to me: does anyone else have any experience comparing those modes? Given how this works, it should be obvious that at least some fraction of the time the camera can not confirm focus, even though the focus is fine. E.g. due to vibration or excessive motion blur, that may or may not affect a shot taken at that time. For the A7R4 you will not get many BIF shots at all if you set this to focus priority. This is worse in low light, and it's likely worse still when using a TC.
Even if the camera confirms focus, it doesn't mean it's in focus, this is called a "false positive", and what you described are "false negatives". Both false positives and false negatives exist. Release has the additional advantage of working at regular intervals, so if you want to show a sequence of images, like a .gif, this is what you need.