EF 70-200mm F4 L and Canon 2x tele converter

[Clint_Black]

Hi,
I know this has been asked before but I can't find a definitive answer searching through the posts. (It's a question from a friend, I wish I could afford this lens.)

Can someone tell me if this combination will result in a loss of autofocus on a 350D?

Thanks

 

[RobertP]

f5.6 is the autofocus limit so the 2x extender will take it over that. Manual focus only.

1.4x instead of 2x will work AF though.

 

[digitalfailure]

The 2x extender never gets a decent write up, where as people rave about the 1.4x

 

[Matt]

2x suck donkey balls in Sigma guise

1.4 is much better

 

[Jonny]

2x suck donkey balls in Sigma guise

1.4 is much better

Told you so haha

 

[Clint_Black]

Thankyou !

 

[CarlOgden]

http://www.brecrest.co.uk/norway/f2boat_04.jpg

70-200 f2.8 with 2x TC on a 1DMk2 AND the lens is out of calibration, currently in with Canon at the moment getting sorted, along with my 100-400 ...

Carl.