Help me out with a buying decision: What is better about the a7R IV vs a7R III (besides resolution). Is the EVF significantly better? Improved AF.
I’m just doing a little dream-scheming. A used a7R III would be a whole lot less expensive. Main thing I’m wanting above all else is excellent AF upgrade. The a7R II’s AF is awful “AF”.

From what I can see the differences are:
- Higher res sensor
- 567 AF points compared to 399 on the RIII
- Eye AF in video
- 5.7 mill dot EVF vs 3.6mill
- Larger grip, weather sealing and build
- 2 UHS-II slots
A decent amount of upgrades and I think the AF would be the main one for me if it was my decision.





