Thje DigiSlave-3000 Flash Unit
You asked about the DigiSlave 3000 flash. Please keep in mind that it can be used on any digital camera. I own both the Metz-28 and the DigiSlave-3000 slave flashes and I prefer the DigiSlave-3000.
The attached photo was taken from a distance of 35 feet using the DigiSlave 3000. The flash head also tilts nicely allowing you to use bounce flash. I have been very pleased with the performance of the DigiSlave-3000, and I would personally recommend it to anyone.
Have a great day.