Hi all,
I just took a look at this here chart:
Sigma 150-500 vs Canon 100-400 + 1.4 TC II![]()
It quite surprised me - any obvious drawback I'm missing here?
I don't know about AF but understand there is a tape trick that some say works great and others say doesn't, but IQ wise it looked to me like the 100-400 even with 1.4 TC was cleared.

