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Old Sep 21, 2008, 4:01 PM   #1
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I've read alot of good thingsabout the kenko 1.4x teleconverter, but can not get a clear answer ifthe AFwill work with my setup or not. I use a Canon 30D with the 100-400L 4.5-5.6 IS.

Just wondering if anyone out there has used this converter, and if the AF will work with my lens.

Thanks

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Old Sep 21, 2008, 5:26 PM   #2
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Nope, the teleconverters, with Canon cameras, stop AF once it goes beyond F5.6. Which means that the one stop loss due to the teleconverter will make your lens go beyond F5.6.
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Old Sep 23, 2008, 5:33 AM   #3
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KALEL33 wrote:
Quote:
Nope, the teleconverters, with Canon cameras, stop AF once it goes beyond F5.6.
Not true a 1 series camera will have AF up to f8.

You can get AF with your 100-400 by using a non reporting TC (kenko 1.5x, cheap tamron TC) or by using the tape trick.
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Old Sep 24, 2008, 7:19 PM   #4
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TG wrote:
Quote:
KALEL33 wrote:
Quote:
Nope, the teleconverters, with Canon cameras, stop AF once it goes beyond F5.6.
Not true a 1 series camera will have AF up to f8.

You can get AF with your 100-400 by using a non reporting TC (kenko 1.5x, cheap tamron TC) or by using the tape trick.
That's why I stay away from the 1 series boards on dpreview. My knowledge of that level of cameras is pretty slim.
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Old Sep 25, 2008, 8:22 AM   #5
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KALEL33 wrote:
Quote:
TG wrote:
Quote:
KALEL33 wrote:
Quote:
Nope, the teleconverters, with Canon cameras, stop AF once it goes beyond F5.6.
Not true a 1 series camera will have AF up to f8.

That's why I stay away from the 1 series boards on dpreview. My knowledge of that level of cameras is pretty slim.
But in the end it's not relevant anyway since the OP is not shooting with a 1-series.
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Old Sep 25, 2008, 1:56 PM   #6
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Thank you all for the advice. I still have some thinking to do!!!:shock:

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Old Sep 26, 2008, 1:39 AM   #7
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JohnG wrote:
Quote:
KALEL33 wrote:
Quote:
TG wrote:
Quote:
KALEL33 wrote:
Quote:
Nope, the teleconverters, with Canon cameras, stop AF once it goes beyond F5.6.
Not true a 1 series camera will have AF up to f8.

That's why I stay away from the 1 series boards on dpreview. My knowledge of that level of cameras is pretty slim.
But in the end it's not relevant anyway since the OP is not shooting with a 1-series.


Only correcting the reply letting the OP know of the fact. Why post only to criticise my reply and offer nothing relevant to the original topic JohnG?

If I wanted to be treated like thisI will post on dpreview.
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Old Sep 26, 2008, 4:40 AM   #8
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Sorry if you take it as criticism. But what a 1-series can or cannot do isn't relevant to the OPs situation. The other part of youre response was. I merely suggested to the OP what a 1-series can or cannot do really has no bearing on his question.
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Old Sep 26, 2008, 8:52 AM   #9
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Was just correcting KALE33 reply
Quote:
"Canon cameras, stop AF once it goes beyond F5.6"
and making the OP aware that this is not the case with all Canon cameras. Just thought it might be a bit of useful information highlighting the difference in features between cameras in Canons range.


No criticism taken JohnG maybe I could have worded my reply better.


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