Alpha 7 V

The A7V looks extremely overpriced for anyone not already heavily entrenched in the Sony system. You can buy a used/refurb Z8 for a similar price (less, actually, if you go used), and from a feature/performance standpoint, the Z8 directly competes with the A1II which at the moment costs $3,500 USD m

The Sony a7IV is a pretty old camera, released in 2021. The Z6iii is a much newer camera, released in 2024. The A7iv has an extremely slow sensor, with a readout time of 1/15s. So its eShutter will have extremely bad rolling shutter problems. Relatedly, its maximum burst rate is 10fps. In contrast,

Sony a7v sensor readout is about 62ms and my canon r7 is about 35ms. Rolling shutter shows up about 10%of my shots, so yeah it’s got to be from the read speed. Go mechanical or buy a faster readout camera. Sony a9iii for 0 second read out but anything around 10ms is probably good for this scenario.