Here are a few I just took today. I had to down sample the jpg significantly and I have some I can't seem to get small enough to post here, the original full quality is even better.
All of these shots are around iso 650-2000.
Camera Sony a1, lens Sony 200-600 with 1.4x, all shot at 840MM.
It isn't that my D850 couldn't have focused on these shots but rather the speed it happened. I wasn't sitting and watching one specific bird waiting for it to take off or land on a perch. I was walking around a nature preserve looking for birds that are flying to test out the a1. Each of these happened fast, pull the camera up to my eye and fire away. With the D850 I would have missed some simply because it takes a lot longer to get a focus point onto the subject. With the a1 set in medium spot or zone with bird eye af tracking all I had to do was get the box on the subject and compose, tracking took over and it didn't care if the focus box was on the other side of the frame. The little birds on the thorn branches were darting around and were there for less than 25 seconds. I have about 90 frames of them! No way I could have kept up and gotten a 99% in focus hit rate and that many frames of them in such a short period of time.
To me this is what is making the Sony stand out. It is fast to acquire, I have never once used the joystick to move a focus point, it shoots so fast I have tons of choices, it finds the eye which makes getting the shot faster, and I have fallen in love with the 1,2,3 user set shooting modes. I have mode 1 set for birds on a perch, 2 for flying and 3 for non bird animals. I have different af mode, shutter speed, bird or animal eye af engaged etc. and I all I do is quickly move from mode 1 for a 1/640th to mode 2 for 1/3200 shutter speed. It is the fastest system I have seen while in the field to have a full settings mode ready for the action you want to shoot. This has also helped nail shots that before I would be trying to quickly jack up my shutter speed or go from single point to a group etc.. Now one quick click and boom I am in business.
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