I emailed Vivitar to check out the 283 I had purchased a year earlier. There are no serial numbers on these units. There are stamped with the country of origin. I was told that the units made in China were around 10 volts and would be safe for newer cameras. By the way, they answered the email within 24 hours.
I've used it on the 5n and istD with no problems. It doesn't have all the snazzy features of a 360fgz. No zoom, no P-ttl, etc.
The 283 is characterized by power and simple predictability. These old units are workhorses and are still being sold because they work so well.
See you later, gs
---------------------------------- George Sinos e-mail: [EMAIL PROTECTED] Web: http://georgesoptions.net Photos: http://georgesphotos.net ----------------------------------
