Digging this back up, I now have an M10 in addition to my M6TTL. Looking into flashes again, something that can work for both hopefully.
With the SF26, I understand that it needs a digital camera's screen to adjust any settings. But, will it still meter TTL with the M6TTL? I'd of course not have the option of flash exposure compensation etc. Just curious if it would be able to work for basic fill flash, and expose properly.