Denise...Don't use a 1.4x with your 100-400. On the 7D 400mm is already 640mm and with a 1.4 a lot of images will be soft, oof...I think the 100-400 was the best choice for you in the first place, when you bought the 300mm I thought you would use it bare (no TC), which is when the 300 actually has an advantage. The 7D with 100-400 is a great combination, IMO you could spoil it by keeping that 1.4x TC on there. Just my opinion.


Bill, Dave...


Those are fantastic. nuff said. especially that swan.


brendan