The Sony GM 70-200mm f2.8 mark 2 lens features four XD linear motors to achieve 30fps shooting speeds on the Sony A1. Watch my real world review of this new GM 70-200 mk2 lens to see real time human eye AF in stills on the Sony A7R4 as well as human eye AF in video on the Sony A7sIII. I test out the image quality at a portrait photography session in the studio where I share SOOC 100% crop sample photos.
