I currently use the 70-200f2.8mkII with the 2xIII TC for birding. I quite like the result I am getting, but just looking for something dedicated for it.
I don't have a huge budget, so I am looking into 100-400, 300f4 and 400f5.6.
Now I read 300f4 + 1.4x isn't nearly as good as the other 2, is that true?
100-400 and 400f5.6 will get me to 400mm native, but is it gonna be a big upgrade from my current setup?
I use a 5D3 and from what I read, I will be able to AF @ f8 with the upcoming firmware update, do you think it will be good or meh?
Ultimately I want more reach than 400mm, probably via TC (can't afford anything 400mm+ native such as the 500mm...).
Any comment is greatly appreciated. Maybe I should just get an used 7D