Which Mirrorless Camera has Best Auto Focus ?

Hands down, Sony offers the best mirrorless cameras in the industry. The a9 III is an example of that. real-time eye autofocus, even at continuous speed of 120fps. The a1 II just launched with an AI chip that takes things even further. Sony's autofocus system has been trained to recognize people and pets as subjects, and will follow them flawlessly throughout the frame. Been shooting Sony for 5 years and nothing else comes close for tracking.

honestly i went through this exact same headache last year when i was trying to find a kit for my own birding trips... i spent way too much time looking at specs and almost bought the wrong thing. you really gotta be careful with all the marketing talk tho because real world tracking is a whole different beast once you get out in the woods. i would suggest looking for some actual field test videos on youtube where they show the viewfinder during a chase... i saw a really good one a few months back that compared the top systems side by side. just search for wildlife autofocus comparison 2024 or something like that and it should pop up. it basically shows how they hold up over a long day of shooting. its way better to see it in action before spending the cash. TL;DR: dont just trust the hype, go watch a few real-world field tests on youtube to see how the tracking actually handles messy backgrounds.

Nikon Z9.

To add to the point above: I totally agree with the frustration regarding the marketing speak vs actual performance. Ngl it drives me crazy how the industry has shifted toward these insane price points. You're basically forced to pay a 'wildlife tax' just to get a processor that doesnt lag when a bird flies by. Its honestly ridiculous how the tech is being gatekept. Looking at the data, the trend is pretty clear:

• Price per AF point has actually gone up if you count the body cost
• Thermal throttling is still an issue on bodies that cost four figures
• Lens ecosystems are becoming more closed and expensive It really feels like a scam when you realize how much extra you have to drop on proprietary cards just to use the burst rates you already paid for. Honestly its such a headache trying to find something that isnt a total ripoff lately. Just a mess.

^ This. Also, in my experience after years of chasing ospreys, the body is only half the story. I once upgraded to a top-tier mirrorless expecting magic but kept my old adapted lenses to save some cash. Big mistake. The AF was jumping all over the place because the lens motors just couldnt move fast enough to keep up with the new sensors. It was super frustrating missing shots while the camera claimed it had a lock... it felt like the tech was fighting itself. Native glass makes a world of difference for that instant snap focus. If youre getting your dad a beast like the Z9 or an A1, make sure he has lenses that can actually talk to the body at that high speed. Tbh, older lenses on adapters often bottleneck the whole system and you end up with blurry birds anyway. TL;DR: AF speed depends heavily on lens compatibility. Native lenses are a must for wildlife tracking if you want to actually hit those high frame rates. Quick tips:

• Check the lens max burst rate specs before buying.
• Update lens firmware the second you get it out of the box.

The soon to be announced Sony a1 II.

Nikon Z9 and Z6 III.

For wildlife photography with top-notch autofocus, I highly recommend the Sony A1. It's pricey, but the AF system is incredible for tracking fast-moving subjects like animals. The 50MP sensor and 30fps burst shooting are perfect for wildlife. The eye-AF for animals is incredibly accurate. If the A1 is out of your budget, the Sony A7 IV is also excellent and more affordable.