I've just got a couple of Vivitar 283 flashes and a set of DSLRKIT (http://www.ebay.co.uk/itm/110980410870?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649) radio triggers. The plan was to have some external flashes which would remote trigger from the NEX 6. The hot-shoe on the NEX 6 is apparently standard so I thought it would just work like on a DSLR.... Has anyone had similar problems with not being able to make the set up work and know a work-around or have I bought a kit that's not compatible?
Have you measured the voltage that your 283 presents? How old are the 283? I have a late 70s vintage 285, and it presents about 350V across the contacts. That worked great with my Nikon F, but will fry a lot of modern electronics. Your flash claims to work to 250V.