I imaged it last year using the Gstar Ex camera and a 100 mm varifocal lens.
I apologise, the image quality is crap, I had no tracking.
One was taken using the lens at 100mm the other at 55mm.
It gives you an idea of how BIG this galaxy is.
Can't wait to try the 20d on it. The only fast lens I have is a 50 mm but it should do the job.