re: blurriness on distant subjects:
My initial image post in this thread of a Snowy Egret hunting minnows,. ( https://photography-on-the.net …showthread.php?p=19400660 not the great egret in the second image)
....the series was taken at a distance. It was a cool (ish) overcast day so not the sort of conditions where I'd expect heat haze to effect the AF. Nor was it foggy, just overcast.
I had a large percentage of OOF images the further the subject got. I could see none of this in the viewfinder, it was only made obvious when I had them up on the big monitor. These were also the only images of the day that OOF was an issue, these distant ones with an almost stationary subject.
I attributed this to the "always on" af issue which seemed to have a habit of moving AF off of my subject at this distance.
I wonder if this behavior was instead similar to what Levina and Grzegorz are discussing? I've not had the chance to try this again with that "feature" finally turned off, nor have a compared side by each with the R5, but I hope to do so soon.
It will have to wait however, tomorrow I jet off the Newfoundland for a long delayed funeral. I think Ill pack the r7 vs R5, but haven't decided yet. Won't be much time for wildlife, and have to pack very light, so at best, one body and the longest lens is likely the 100-400mm with 1.4x in the bag.
One of the wild Alaska video reviews mentioned that sort of issue with the tracking AF on.
Turning it off solved these focus pulling issues.