Here's a roundup of all the upcoming TTL/HSS Wireless Flash Trigger Systems from Sony, Phottix, Godox & Nissin for Sony cameras with Multi-Interface Shoe.
Vello Off-Camera TTL Flash Cords for Sony Multi Interface Shoe
First impressions of the Godox XPro - The ultimate flash trigger?
Guide to TTL+HSS Flash Triggers for Sony Multi Interface Shoe
Guide to TTL+HSS Flash Triggers for Sony Multi Interface Shoe
Godox XProS TTL Flash Commander Trigger for Sony How-To and Why
YONGNUO YN680EX-RT GN60 TTL HSS Flash With Lithium Battery For Canon Camera
Review: Godox Thinklite TT685S TTL (Sony)
Cactus Wireless Flash Transceiver V6 IIs for Sony Multi CACV6IIS
Phottix Announces Odin II TTL Flash Triggers
Guide to TTL+HSS Flash Triggers for Sony Multi Interface Shoe
Godox X2T-S TTL Wireless Flash Trigger for Sony - Camera Gear
YONGNUO YN685EX-RF On- Flash Master Slave Speedlite GN60 TTL 18000s HSS 2s Recycle Time with 2.4G Wireless Trigger System Replacement for Sony A7 Series A6600 A6500 A6400 A99 A77
Godox V350S Flash for Select Sony Cameras V350S B&H Photo Video
Godox XproII-S TTL II 2.4G Wireless Flash Trigger High Speed Sync 1/8000s X System High-Speed with Big LCD Screen Transmitter for Sony DSLR Camera : Electronics
Flash for sony multi interface shoe: Sony Alpha SLR/SLT A-mount Talk Forum: Digital Photography Review