reewik wrote in post #2090513
After much thought I have decided that I will hold out for the 500.... I was out shooting this morning and as usual I had to stack my converters to get the image I was looking for. That being said loosing 100mm is not going to help me at all!
You seem to be wise beyond your age, Eric.
Any time you start mounting TC's on a lens, you are onto a compromise of some sort or another.
If you need FL because you are into wildlife photography in a very focused way, I think you should aim to get the lens that will get the job done natively.
If you want a versatile super telephoto, a bit of sports, some portraits, birds here and there, relatively good portability.....then the 300 f/2.8 might be the best there is. Such being the case, on occasions when pressed for FL, you can even place a 2XTC on it for a viable 600mm.
If I remember right, your 400 f/5.6 is a very fine lens. You could gain some operational advantages with the 100-400. However, for a decisive upgrade, it looks like you just need to get the 500.