Canon 24-70 F2.8L USM with 1.4 or 2.0 Teleconverter - Does it work?

Hi,

I'm just wondering if anyone has tried either of these teleconverters with
this lens?

I'm curious to know if it will focus - or will focus automatically - or can
be focused manually.

Many thanks,

Colin

 

My memory of the Canon-provided information is that the teleconvertors
(they call tem "extenders") are designed and proven to work with
lenses of focal length 135mm or longer.

Click the Note link on this page:
http://www.bhphotovideo.com/bnh/con...s&Q=&sku=220456&is=USA&addedTroughType=search

or
http://tinyurl.com/7bcv9

 

Oops. Pick the "Features" tab first

 

Sigma have just introduced extenders which they claim will work with all
lenses. I've had no practical experience but when I went to buy a 2x for
my now departed 20Ds, I was told it wouldn't work with that zoom.

 

No, it will not work! I have the the 1.4 extender and the 24-70 lens and
the extender will physically hit the rear element of the 24-70 before even
getting close to being able to mount it. No real surprise there as Canon
does not list that lens as one that will work with either extender.
On the other hand the 1.4 extender and the 70-200 f2.8L is a great match!
Chuck

 

If you get the Canon ones they will but avoid the Canon 2X it's a bit
of a dog unless you must have it. For the price of the pair I would
buy the 70-200 f/4.0L for a few dollars more.

Here are user reviews of them.

http://www.fredmiranda.com/reviews/showcat.php?cat=31


*********************************************************

"I have been a witness, and these pictures are
my testimony. The events I have recorded should
not be forgotten and must not be repeated."

-James Nachtwey-
http://www.jamesnachtwey.com/

 

Tried that lens with a 1.4 canon extender and a 2 times Kenko last weekend.
Both focussed well although the Kenko seemed a little soft but not much.

regards

Don

 

Cancel my last reply, the lens was the 70 to 200f2.8 NOT the 24 to 70.
Sorry, need to get specs or just plain getting old

regards

Don from Down Under

 

What I gathered from the press release on DPReview what that they would only
work on Sigma lenses. "Digitally optimized tele-converters, exclusive to
Sigma's telephoto and telephoto zoom lenses."

 

Not the canon models, read this

http://www.canon.co.uk/for_home/product_finder/cameras/ef_lenses/extenders/index.asp

 

Thanks everyone.

By the way, has anyone ever tried to stack a 1.4 and a 2.0 teleconverter
onto something like a 70-200 at the same time?

 

I'll admit to sitting here and staring at the three items, and
wondering...

With the horror stories about Mr Canon's repair rates, and the cost of
the equipment, I haven't had the nerve.

 

I've considered it, but you would lose three stops of light and the
ability to auto-focus, and I would imagine a big drop in image quality.

Kelly

 

Ah - so you're saying I should get someone else to try it first

 

http://www.jibble.org/stacking-teleconverters/