If it is all compatible then try it, just be careful! Have a look at the rear element in the lens and see how far back it travels when zoomed and focus is changed.
My canon 100mm macro can't be used with converters because the rear element of the lens would hit the front converter element - glass on glass is not a good idea! However I can put a small extension tube between the two then it would work fine but I rarely use that combination.
As for light issue - if you are using a ring flash you should be fine but remember that the increased focal length will mean reduced depth of field but that may well be off set by the increased physical distance you are away from your subject!!! Now it could get confusing
Jason