Originally posted by ninelives
that are also 3rd party flash for Minolta mount.
look at this chart : http://www.sigmaphoto.com/html/flashes.htm
hmm... what I wanted to say is that many other manutacturers allow the use of standard mount flash (no TTL of course! but there're very good non-ttl flashes out there), but Minolta requires a "minolta mount" for the flash to even fit the special hotshoe.