use the flash on my Leica M, the TTL is not known! In this regard, this flash is exactly what I need! Fueled power and treated very carefully. The only (minor) criticism strikes me is the locking wheel friemelige on the foot end. This makes Canon example with small verschiebaren Ironing much better! Otherwise, I get a device that conforms to the dimensions in about a Canon 580 EX II, but it is a little easier and the weight distribution IMHO better than its Canon counterpart! The display is now not the best, but more than enough! The integrated radio receiver works as desired and save a few euros by eliminating an external receiver! In short: I get for a few euros an extremely powerful, easy to use and lightning in any case that provides the grounds for criticism by the mentioned locking wheel. Which is manually operated with this unit flashes more than good. Therefore, all 5 stars
