Hiya,
I am thinking about buying either some extension tubes or a macro bellows for
my Canon T90 (FD lenses).
I have never used extensions with normal lenses and am wondering what to

can anyone give an explanation of what to use and why?
I've been trying to do the research on what to shove on the front of a
DSLR, and come across many conflicting opinions. As usual Google is
hopeless and just throws up page after page of sites that want to sell