If you're looking for an Alpha Flash from Sony that won't cost you an arm or a leg, try this one. The slave capabilities are almost at the level of HVL 42am
Wireless Macro Twin Lite Flash - Meike MK-MT24S for Sony MI Hot Shoe π· Mount Mirrorless Cameras such as A9, A7III, A7RIII, A6400, A6300, A6000, A6500, A6600 and more
11 Review
Godox TT685F Speedlite Flash for Fujifilm - 2.4G TTL, GN60, 1/8000S HSS, 0.1-2.s Recycle Time, 230 Full Power Flashes, 22 Power Output Steps
10 Review
YONGNUO YN660 Speedlite: Versatile Wireless Manual Flash with GN66 Power for Canon Nikon Pentax Olympus
10 Review
Canon 600EX RT Speedlite Flash Black
10 Review