Canon 100-400L and 1.4x teleconvertor

[Andywhite1]

Thinking of getting 1.4x teleconvertor for use with canon 100-400 l and 700d then maybe on a 7d
There is a lot of information out there sometimes very conflicting
I have read that some camera modes and features become unavailable on certain cameras
And stories of people tapeing up pins
Thanks for any help

 

[Steve5D]

You shouldn't have a problem...

 

[Big Mike]

Check the compatibility for Canon Teleconverters, I'm thinking that the 100-400mm L is not on the list.

The main reason for that, is that the lens has a maximum aperture of F5.6 (at the long end)....and when you add a teleconverter, you reduce the effective maximum aperture. So that lens, with a 1.4TC would have a maximum aperture around F8. Most cameras require at least F5.6 in order for the AF system to work properly.
So using a TC with that lens, may disable your AF. That may not be a deal breaker if you can manual focus though.