
This one works, but it's so cheaply made it won't stay on the flash. I personally like to use coffee filter paper over the lens, it works much better. The problem is nobody takes you seriously. :( I told everyone to leave me alone and see the end product which works great with coffee filter paper.

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

Enhance Your Photography with the Olympus FL-600R Wireless Flash
9 Review