Best External Flash for Ricoh GR IIIx
The GR IIIx has no pop-up, a P-TTL shoe, and a leaf shutter that syncs without HSS. Overall: Pentax AF201FG. Value: Godox Lux Junior. Budget: Godox iT20 R. Skip FlashQ X20 and GF-2 as the defaults.
Best Flashes for Fujifilm X-T50
The X-T50 syncs flash at 1/180 s, has a GN 3.9 pop-up, and will not fire flash on the electronic shutter. Overall: Godox V1Pro F. Value: Godox TT685II-F. Budget: Godox TT350F. Skip EF-60 as the default.
Best Flashes for Sony a7C II
The a7C II syncs flash at 1/160 s, has no pop-up, and disables flash in Electronic Shutter. Overall: Sony HVL-F46RMA. Value: Godox V1Pro S. Budget: Godox TT685II-S. Skip F60RM2 as the default on this compact body.