Canon 1.4x Extender - couple of quick questions?

Looking at adding this to my list of items to get. This would go on my 70-200 f/4. With that said am I correct in saying the following:

- AF will still work
- I loose a stop, so instead of f/4 I get f/4.5
- Image quality is still very sharp

Anything I am missing here? Thanks!

Hank

Have a look here

EDIT: Strange, first time a double post with only one click on submit????

Close...

- AF will still work : Yes
- I loose a stop, so instead of f/4 I get f/4.5 : nope - you get F/5.6 (1 stop from f/4)
- Image quality is still very sharp : Yes

1.4x TC and the 70-200 f/4 L works very well.

Thanks for the quick replies. I meant f/5.6, not sure what I was thinking

Hank