duncang wrote: Daran wrote: ruthenium wrote:
I understand "AF" and "Release", but what does the "Balanced Emphasis" do? This makes me wonder whether "AF" might be the more appropriate setting with the 200-600? I know that this would not allow 30 fps, and I am fine with this.
During AF-C AF is measured using the PDAF pixels. When the subject is constantly moving, that will return a sequence of approximate phase distances, or rather a set of such distances within the tracking area. These are not precise (there is noise involved), the subject edges to focus on are usually complex shapes and if the subject is fast enough, they won't really go to zero. Hence the question of whether the subject is or will be in focus when the image will be taken isn't necessarily binary.
So my interpretation of balanced priority, that seems to agree with my observations, is that it will shoot about as long as the subject isn't definitely OOF. Whereas AF priority shoots only if the camera is positive the subject is in focus, which given above may still be wrong. Release priority obviously shoots no matter what PDAF is reporting.
So while AF priority may make sense for reasonably still subjects, I can attest that it will skip BIF shots that would have been in focus.
"I can attest that it will skip BIF shots that would have been in focus".
You have some proof to back that up or is this just your theory ?
Not sure what you are aiming at. Obviously the shots are missing, so I can't show them as being sharp.
If you have a sequence of a bird, that is not heading your way, and with a plain and distant background, keeping the focus on the bird rather isn't very demanding for the A1. So a sequence of sharp images with nothing out of focus is kinda the norm. Now if you shoot such a sequence with AF prio, you get less images compared to doing the same with balanced prio. As I think you know? Which I think proves my point?
Mar 14, 2023 at 02:39 AM
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