Weibo posted this size comparison between the new Sony FX3 and the SonyA7RIV. The real difference is the thickness because of the cooling vent and flip+articulating LCD screen.
Another source told me the FX3 will have the Cine Colour profile like the new Sony A1.
Specs known so far:
- 12MP Full Frame sensor (same A7sIII sensor)
- No ND
- Has Still mode
- It has IBIS with active mode
- Same NPFZ 100 battery
- Full size HDMI
- mic input on body and handle
- Dual slot for CFexpress A cards and SD cards
- Price is 3795 Euro
- records 4k/120p and not 8k
- Announcement on Feb 23 at 15:00 GMT time