7rv00303_25 
The image above was cropped from a 60Mpixel frame all the way down to just 6Mpixels. It’s quite clear how well the bird eye autofocus is working on the A7RV.
This was shot at ISO 4000 at f/4 at 200mm, 1/2000 using the 70-200mm GM II, without a teleconverter. I’m processing these images using the most recent update of DxO PhotoLab version 5, but the only modification I did was use DeepPrime processing to reduce some noise in the background. I was in an aviary with some light, but not a lot; that is what drove the ISO up to 4000.
You can see why these are also known as rainbow finches.