@tjons, So, I guessed the wrong lens… 🙂
Haha, I do have a macro lens, Tamron 90mm f/2.8, and I know that shallow DOF feeling! Like struggling for 10 minutes to get a whole ant in focus… In that case, backing up is definitely the best option. I shoot Nikon, so I’m not sure how many megapixels you’ve got in a 7D, but you could crop it to size later maybe to get your magnification. That’s what I do.
Keep messing with macro, It’s so hard, But entirely worth it.