>>3379412>Though, they do add a great deal of aberrations to it.I use an old Canon 240 close up lens, it ain't half bad. Manages 1:8.6 at 70mm (it's actually ever so slightly less at 24mm) or the same as 1:4.9 on APS-C or 1:3.2 on full frame.
Both images at 70mm, with the close up lens on the left (24mm without the lens would give almost as much magnification but with much softer edges, plus much less working distance).