Yes. That's the one. Optically superb, just lacking IS and a bit more weather sealing compared to the 100L/2.8 macro.
I was doing my research, comparisons with the MP-E65, and others and this one seems to be the most recommended.
You may end up with an MP-E 65 one day, but the learning curve is very steep. If you master the 100/2.8, but can't get the magnification you want, even with judicious cropping and enlargement, then it'll be time to ponder the MP-E 65, but not before. The frustration you'd probably experience in getting to grips with it could kill your interest in macro completely!
GreenElementPhoto wrote in post #16651871
Also...
I use a Canon EOS Rebel T3i for my shooting and have gotten relatively impressive results with it, so I wonder if the flash you mentioned would be compatible for my camera?
Hmmmmm - I think so, probably, but do some digging to convince yourself. There are other options too. The 568 has high speed synch, useful for general photography, but not necessary for macro work, and it is a fairly powerful unit, not always needed at close range, but then again, often you'll be using narrow apertures top get adequate depth of field. I previously used a YN 465 - cheaper, less powerful, and no HSS, but OK for macro.
There are also ring flashes from various suppliers. I used one back in the days of film, but I found the "O"-shaped reflections were sometimes off-putting. With a standard flash, you have many options - bare, diffused, etc, and options of positioning not available with a camera/lens mounted flash.