I did a search but couldn't find exactly what i was after,
I have a 70-200 f2.8 L IS II and was intending to get a 1.4TC to get a 280mm f4 IS at the long end, but i would also like to get a longer prime lens for use at BTCC, DTM and Moto GP events.
Would the 300mm f4 be a waste given that i can get to 280 with the 70-200 plus TC?
Ultimately i will get to 400mm f5.6 with the TC on the 300 or should i just go straight to the ef 400 f5.6 with no TC?
It seems that going the way of the 300 i can have a faster 300mm with the option to extend with the the TC as well as having IS?