Thanks for sharing, the crop is really sharp, Im happy with my 13 year old but new to me 100-400mm lens, but after seeing this I will keep both in mind, I think either way I would have been happy.
This further reassures me how much i love the 5dmk3, I love the switch to FF, I rarely shot telephoto in the past, which is what drove me to full frame, i loved my 24-70mm on the 7d but always wanted wider on average for all lens I used.
On my 7d I would occasionally borrow my friends 70-200mm non is L for or sigma 70-200mm and felt it to be to short but useful, i used it for weddings/bat/bar mitz/etc and it filled the need and am always impressed with the results of all canon 70-200mm L lens. I loved it for photojournalistic shots at events, but for personal use I felt 200mm even on a crop to short if i needed reach. Great portrait lens thought.
I was all set to buy the 70-300mm and if the price was right would have picked up a used 28-300mm, went with the 100-400mm and love it, its a used lens and from one day of use i love the results, I was weary of finding a tack sharp used 100-400mm, i was always weary of Ls in the used market, concerned that if a good copy was out there it would be held on to, but as i know myself, sometimes you have a great lens you need to unload to get another one that better suits you.... and with the new used lens, im very happy.
Anybody have any full frame samples with a 1.4x? Will the lens accept a 2x?
Glad I didn't sell my old 7d yet, tomorrow I plan to test the lens a crop body. Also I have heard some reviews that people didn't like the 100-400mm and rarely used it but loved the results on the 5dmk3.