I’ve got the old cheap Canon 100mm macro I’ve been using with my Canon 5DIII. Read via Nate’s post that he doesn’t recommend using adaptors and I could see it would be a little tricky.
I just think framing up the images would be a lot less trouble for my neck as I’m framing.
Also the T30 I find is less clunky for any long exposures, lighter and easier to secure on a tripod.
Also looking for the right LED panel as my iPad 2 isn’t ideal.