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I’m shooting the new Sony A7r5 and the newest Sigma 150-600 Sports with the native Sony e mount and the auto-focus has performed flawlessly for 90% of my subjects, flight static, etc., until I try to get focus on my small songbirds and warblers, especially in any type of nearby cover. I’ve tried various methods and settings and I normally use the “small spot” with the smaller birds. All I see is a “blob” of OOF birdy most of the time. It’s really getting quite frustrating, And I am missing far more captures than I get. I even had a scissor-tailed flycatcher sitting on barbed wire in the open and it wouldn’t focus on that either until I panned over to a fence post focused on that and then returned to the bird. It’s the same with the birds in the thick of things as I have to find a branch to focus on and then return to the bird, but most of the time the bird is already gone by the time I find it again. This camera has the new AI chip dedicated to certain subjects like human , bird, etc. and it’s set for bird…. “Duh”

I have read that this is an issue with many mirrorless cameras with “on-sensor” focusing. So how do you guys work around this? Meanwhile my vocabulary of profanity has expanded tenfold. This was NEVER an issue with my Canon DSLR’s whatsoever…