Not sure how they do TTL, going to be interesting to read the manual. The big concern I have is the lack of any kind of interface. It should work fine as a slave to a primary strobe but I would think backscatter is going to be a big problem when used as a primary stobe. If you read the adds carefully they indicate it is a secondary strobe or for macro use. Your going to have to shield the internal flash to reduce backscatter if you use it as a primary strobe for med to wide angle shots.
Here is a link to the on line manual. http://support.olympus.co.jp/jp/support/dlc/archive/man_ufl1.pdf
Here is a link to the on line manual. http://support.olympus.co.jp/jp/support/dlc/archive/man_ufl1.pdf
