How about some concert shots? I took my daughters to see Taylor Swift, and no lenses longer that 3 inches were allowed in. Bust out the Q7! I mean, shooting a moving target in crappy irregular lighting from about 2 miles away, you know that'll work, right?
Here's the scene with the 06 at 22mm:
Here's the 06 at maximum reach:
And here's my DA70, on a Vivitar macro 2X TC, on a PKA adapter. Manual focusing and handholding a 644mm equivalent through a stopped down aperture, most of the shots were junk, but this turned out ok: