hi all so interested to learn a bit more about the tamron 150 - 600 tele lens and keen to compare its quality to that of the C 100 - 400 fitted with 1.4 ext ( which i do have ) - so any users here and if so what do you use it for e. g . wildlife, birding etc and on what C camera - and how do you find its quality etc at the long end i.e. say at 550 maybe 600
cheers and best rob