Here is some additional information on the new Sony HVL-F60RM2 (pre-order: Adorama | B&H) and HVL-F46RM (pre-order: Adorama | B&H) flash units that were announced together with the Sony a7 IV camera:
Sony HVL-F46RM Wireless Radio Flash
- Compatible with Sony ADI / P-TTL
- Per-Frame P-TTL Flash Control
- On-Camera Flash & Transceiver
- Recycle Time: 1.7 Seconds
- Flash Control Linked to Face Detection
- Up to 60 Consecutive Flashes at 10 fps
- Comprehensive Control from Sony Alpha
Sony HVL-F60R II Wireless Radio Flash
- Compatible with Sony ADI / P-TTL
- Per-Frame P-TTL Flash Control
- On-Camera Flash & Transceiver
- Recycle Time: 1.7 Seconds
- Flash Control Linked to Face Detection
- Up to 200 Consecutive Flashes at 10 fps
- Comprehensive Control from Sony Alpha