why do you want to know how much camber it has? surely you adjusted it so it had the optimum amount of camber through setting, driving and checking?
oh, hold on, you just set them to "max negative" maybeye this wasn't the best idea.
just tell people you have 3 degrees of negative camber.
but if you really want to know, take it to a suspension place and have them tell you, then have them set it to around 2 degrees at the most, unless oyu are planning on doing heaps of dorifting or circuit racing, huge negative camber |= good handling.