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Author Topic: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC  (Read 13600 times)

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Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« on: September 04, 2012, 01:44:39 PM »
From Arthur Morris
Arthur has written a great article about getting f/8 autofocus with the new Canon EOS-1D X. A lot of birders used the EF 800 f/5.6L IS with the Canon 1.4x TC & EOS-1D Mark IV for example. The biggest complaint with the EOS-1D X has been the inability to get f/8 autofocus.

However, with the Kenko Teleplus PRO 300 DGX 1.4 teleconverter you can give the EOS-1D X the ability to autofocus at f/8 with the EF 800 f/5.6L IS. Another plus of using the Kenko teleconverter is you’re able to move the AF point at f/8. With the Canon teleconverter on say, the 1D Mark IV, you only had the center AF point active.

Arthur has posted lots of images to show the image quality that is possible with the Kenko 1.4x TC.

From Arthur Morris

Once I got down in the mud I discovered that AF with the the Kenko Teleplus PRO 300 DGX 1.4x AF Teleconverter was fast and sure and accurate. I have been out every morning and afternoon since then and have totally fallen in love with the 1DX. That first afternoon I managed to get a huge gob of black, sticky, gooey much all over my brand new camera. It was a proper baptism.

Read the entire article

Kenko 1.4 TC at B&H $259 | Canon EOS-1D X at B&H $6799

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Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« on: September 04, 2012, 01:44:39 PM »

Vinniej

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #1 on: September 04, 2012, 01:52:51 PM »
Wonder if it would also work for the 5DIII.

neuroanatomist

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #2 on: September 04, 2012, 02:04:48 PM »
Wonder if it would also work for the 5DIII.

If you read Art Morris' article, you'll find the answer.  Hint - if you're a 5DIII owner, you won't like the answer.  But it's there. 
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neuroanatomist

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #3 on: September 04, 2012, 02:05:40 PM »
My question is if the Kenko 1.4x TC allows AF with an f/5.6 supertele on a 1D X, does the equivalent Kenko 2x TC allow AF with an f/4 supertele on a 1D X?
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cliffwang

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #4 on: September 04, 2012, 02:05:57 PM »
I don't get it.  Does that mean AF doesn't works on Canon 1.4 TC + F/5.6?  Anything special for Kenko TC?
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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #5 on: September 04, 2012, 02:09:39 PM »
Gives me some confidence to challenge the price of that 1Dx :(
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littlebob

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #6 on: September 04, 2012, 02:12:25 PM »
I guess I am the only one who decided the loss of one stop, reduced AF performance and reduced resolution is not worth 1.4x with today's high MP cameras because I can easily crop that much. I have not used my Canon 1.4x in a couple years.

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #6 on: September 04, 2012, 02:12:25 PM »

Viggo

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #7 on: September 04, 2012, 02:49:47 PM »
So I guess someone read my statement, LOL

http://www.canonrumors.com/forum/index.php?topic=8705.0
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Vinniej

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #8 on: September 04, 2012, 03:12:47 PM »
Wonder if it would also work for the 5DIII.

If you read Art Morris' article, you'll find the answer.  Hint - if you're a 5DIII owner, you won't like the answer.  But it's there.

Thanks.  Someone in the comments of the article says the Kenko 2x MC4 works with it.

Portrait_Moments_Photogra

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #9 on: September 04, 2012, 03:39:44 PM »
I tried it with the follow;

1DX with EF400L 5.6 plus Kenko 1.4x Pro DGX - f/8 - OK - all AF points works - AF is somewhat front focused.

1DX with EF400L 5.6 plus Kenko 2.0x Pro DGX - f/11- NO GO - Hang-Up - Had to Remove Battery.

1DX with EF400L 5.6 plus EF 1.4X II - f/8 - NO AF but Camera WORKS

1DX with EF400L 5.6 plus EF 2.0X II - f/11 - NO AF but Camera WORKS

Rick Massie

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #10 on: September 04, 2012, 04:10:58 PM »
I tried it with the follow;

1DX with EF400L 5.6 plus Kenko 1.4x Pro DGX - f/8 - OK - all AF points works - AF is somewhat front focused.

1DX with EF400L 5.6 plus Kenko 2.0x Pro DGX - f/11- NO GO - Hang-Up - Had to Remove Battery.

1DX with EF400L 5.6 plus EF 1.4X II - f/8 - NO AF but Camera WORKS

1DX with EF400L 5.6 plus EF 2.0X II - f/11 - NO AF but Camera WORKS

If you have time, would you mind testing the 400 f5.6 and the Kenko 2x on the 1dMKIIN? (I'd say 1dmkIV, but looks like you don't have one handy according to your signature). I'd really appreciate it. I have a 1dMKIV and am wondering (hoping) that the 2x and 400mm will work together on the pre-1dX series.  Thanks!

Portrait_Moments_Photogra

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #11 on: September 04, 2012, 06:26:12 PM »
5.6 plus 2x = f/11 - there's no camera that AF at f/11.... :(

you can manual focus though on bright daylight

My 1D Mark IIN and your 1D Mark IV will work on f/8 but not f/11 - none does :)

hope this helps your inquiry.
« Last Edit: September 04, 2012, 06:28:18 PM by Portrait_Moments_Photogra »

Rick Massie

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #12 on: September 04, 2012, 07:10:59 PM »
5.6 plus 2x = f/11 - there's no camera that AF at f/11.... :(

you can manual focus though on bright daylight

My 1D Mark IIN and your 1D Mark IV will work on f/8 but not f/11 - none does :)

hope this helps your inquiry.

Thanks. I only ask since I saw this quote in the thread Birdsasart.com:

"I did not test the Kenko Pro since Artie had already confirmed that the Pro DGX did not work with 5DIII. The Kenko 1.4X MC4 would cause the same error as the Pro DGX with the 5DIII/800 combo. However, the 2X would work and would even autofocus at f11 with the 5DIII. "

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #12 on: September 04, 2012, 07:10:59 PM »

danski0224

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #13 on: September 04, 2012, 07:26:21 PM »
How long 'til a firmware update fixes this...

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AJ

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #14 on: September 04, 2012, 08:16:51 PM »
I don't understand the need to dial in -1 stop compensation?  Doesn't the light loss caused by the TC automatically result in a lower metered exposure?  I'm confused

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Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« Reply #14 on: September 04, 2012, 08:16:51 PM »