I have a Nikon SB80 that I use in manual mode with my Canon Speedlite.
The other day I was wondering if the FlexTT5 would fire it from the hot shoe.
Sure enough it works. It fires without a problem up to about 1/250 on a Canon 5D2.
I haven't fiddled with the offset timing to see if that can be improved.
Naturally its manual but that was always the case.
Main benefit is that these speedlights are available for a reasonable price used and there are external battery packs available to shorten recycle and number of flashes. Nice complement to the Canon Speedlites for more complex lighting scenarios.



