Quote Originally Posted by HDNitehawk View Post
The camera knows you have the TC on, as long as it is a Canon TC.
I always thought the same when using the TC with zoom lenses that the TC was to "soft". The 70-200mm II might be close to performing acceptable with the TC on but I have never had a need for it, really I have only found the 1.4x acceptable on the super telephotos and primes. Really it all depends on what you think is "acceptable" and my opinion may not match others.
Thanks for the information... Yes, it is a Canon TC and I had a "Senior Moment" on the 70-200 issue... What I shoul have written in is the 100-400. As I gain more knowledge I am not so sure that taking the 100-400 and screwing on a TC might not be presenting a lot of variables in AF... maybe a bit too many. We'll see what happens... it should be interesting. Just ordered the FoCal Pro so I'm sure I will be back on asking more questions.
Bill