This was shot with the 6D and 70-300L at 300mm f5.6, 1/320s, ISO 16000. I think the 6D and this lens were made for each other. I love the combo.
Now mind you, for airplane spotting you'll need a fair amount of light with this lens at full zoom and f5.6. But it's a very sharp lens even at 300mm and the IS is awesome.
















