I've got the 400mm 5.6L ordered along with the canon 1.4 Extender lll. I've been through a good portion of the EF 400mm f/5.6L USM sample photo archive thread and still have some questions.
I'm shooting the 5D mark lll.
It sounds like the AF will not work when using the Canon 1.4 Extender lll...is this correct?
The pins can be taped but what you give up in IQ is significant and the AF is very erratic?
What I'm looking for is better reach and IQ without spending $6000.00 plus.
Now I'm thinking it might serve me better to return the Canon 1.4 and put that money toward a used 7D to take advantage of the crop factor and thus retain the IQ, AF and the reach I'm looking for?
I'm shooting wildlife & birds...any thoughts?