clarkmti wrote in post #17704554
excellent pics - thanks for sharing. I've never used a prime lens and am a little worried about loosing adjustable reach. Have you found the speed of the 100-400 II to be an issue?
I got back into photography in 2011. I started with a 60D and the original 100-400. About a year later, I upgraded the 60D to a 70D. With both the 60D and 70D, the original 100-400 produced some excellent pictures! However, the lens was somewhat slow to autofocus. In some cases, it missed entirely. And the image stabilization was just 1 - 2 stops.
In 2013, I was able to purchase the 300 f/2.8 IS II lens. It is a fabulous lens, and still the best lens that I own. I am amazed by its autofocus speed and accuracy, and the image stabilization really is 4 stops. From 2013 to late 2014, I rarely used my original 100-400. I did miss the flexibility of the zoom, but the IQ of the 300 was worth it.
In December of 2014, I got a 7D2 and the new 100-400 II. That combination has been outstanding. Only the 7D2, 5D3, and 1DX will autofocus the 100-400 II when the lens has the 1.4 TC on it because that turns the 100-400 into an f/8 lens.
My personal opinion is that the 7D2 + 1.4x III + 100-400 II is just as fast and accurate as my 300 II. And the IQ is very close! As I mentioned earlier in this thread, since I bought the 7D2 and 100-400 II, I have rarely used my 300 even though it was the lens I used all the time prior to getting the 7D2 and 100-400 II. And I got back the flexibility of the zoom.
However, I know there are photographers who disagree with me and prefer using the 300 rather than the 100-400 II. It's nice that Canon gives us choices!! I think you'll be happy with either lens. 