p.1 #2 · Subject Detection toggle as custom button.
In specific conditions however. He is talking about swimming in particular; as seen in the extended video below. It's fun you brought this up. I was just watching the video yesterday.
It was really interesting to see that this sort of option is available; although I'm sure experts or professionals already knew about this trick.
p.1 #3 · Subject Detection toggle as custom button.
My SET button has always been set to Subject Recognition on/off toggle. I prefer to do it that way and not have to hold down a back button to have it off. Upper back buttons are a limited resource and I want them used for more useful things.
I only toggle subject recognition off when the thing is grabbing other things in the frame like a knot on a tree or a black mark on the bird that isn't the eye. Don't have to do that often.
The video and suggestion is very specific for swimming and probably makes sense for that unique scenario. I don't think it has much value for a lot of other subjects.
I'd love to have 20mins in a room with that guy who designed the A1II AF. I'd really like to know what possessed them to throw away the best feature of past Sony AF (prioritizing the centre of Wide or Zone) and replace it with the IMO inferior near object priority that just loves jumping to the foreground grass, water etc.
p.1 #4 · Subject Detection toggle as custom button.
Hmmm....I have been having trouble with the focus grabbing the brighter flower when shooting bees and wasps with insect recognition enabled, I'm going to play with turning it off. (100-400 lens on A1 II)
p.1 #5 · Subject Detection toggle as custom button.
I was really thankful to have viewed this video. I often have my Subject Detection on Auto (to automatically switch between birds and animals) and it could be annoying as various (undesirable) objects became framed. After viewing this video, I set my lens button to turn-off Subject Detection when depressed. Problem solved!!