Reddit reviews Canon MP-E 65mm f/2.8 1-5X Macro Lens for Canon SLR Cameras

pretty sure these are greater than 1:1. MP-E65 style required

Macro is one of the most technical sides of photography, a good starter lens is the 100mm macro from canon http://www.amazon.com/gp/aw/d/B00004XOM3?pc_redir=1410422622&robot_redir=1

If you want more magnification after that you can add extension tubes to the lens, but then is getting hard to manage the focus of the lens and the working distance can be awkward http://www.amazon.com/gp/aw/d/B000U8Y88M?pc_redir=1410295973&robot_redir=1

Finally if what you are really after is a microscope like magnification the 65mm macro from canon will do the trick, This is a highly specialised lens and I will not recommend it to a beginner. http://www.amazon.com/gp/aw/d/B00009XVD5/ref=mp_s_a_1_1?qid=1410489652&sr=8-1&pi=SX200_QL40

Depends on the quality you're after.

I can't speak for other lenses, but this is the one I am using:
http://www.amazon.com/Canon-MP-E-65mm-Macro-Cameras/dp/B00009XVD5

That's awesome man, glad it works out for you =] Most likely though, that lens will not have achieved the magnification I needed to fill the entire frame with a 0.2mm aphid.

The only consumer lens I know of that can do that is this canon for $900