Just a quick check on a simultaneous video shot of a distant (approx 1 km) Hydro tower. The Canon 7D had a Canon 400mm zoom telephoto with two teleconverters (Canon 1.4 and 2.0). The Canon 5D Mark 2 had a Canon 135mm which was then zoomed in 600% digitally in post with Adobe Premiere Pro CS5.
Both clips had equal amounts of sharpening applied.
The simultaneous video shots were done with a Cinevate FrankenMedusa rig.