I recently invested in a Canon 70-300L to pair with my 6D. This was taken at the thick end of the zoom range at Edinburgh Castle. I have Parkinson's tremor, and I sway a fair bit; and even with IS a certain amount of micro tremor occurs. So....I am pleased at how this turned out.
PP'd in LR5 to my own recipe.
Edinburgh Candid by petach123 (Peter Tachauer), on Flickr
And here is a self portrait using the 6D paired to my 17-40L
Self Portrait - Sleep Evades Me! by petach123 (Peter Tachauer), on Flickr
PP'd in LR5 to my own recipe.
Edinburgh Candid by petach123 (Peter Tachauer), on Flickr
And here is a self portrait using the 6D paired to my 17-40L
Self Portrait - Sleep Evades Me! by petach123 (Peter Tachauer), on Flickr