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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 04 Dec 2014 (Thursday) 07:27
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1D4 Af with 70-200II and 2x - Really this slow?

 
huntersdad
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Dec 04, 2014 07:27 |  #1

I added a 2xIII yesterday with the intent of using it both on my 1Dx and 600II as well as my 70-200II and 1D4. AF speed wise, I was pleased with it on the 1Dx - AF is slower, but still more than capable of tracking birds. Initial IQ was also very good, so I am pleased with that avenue. This is with either lens.

However, on my 1D4, it is a different story. I have noticed my 1D4 doesn't drive my 600 bare or with 1.4x as fast as the 1Dx. To say it is slow wouldn't be fair, but it is noticeable. When I added the 2x, it crawled. AF speed was no better with the 2x on the 70-200, which was a little shocking to me. IQ wasn't a problem but focusing speed is a big one.

Is this typical of the 1D4? I know people have used the 2xs on their 70-200 for birds with great results, so I can't think that the AF speed I am seeing can be reasonable. Any thoughts?


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Jon_Doh
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Dec 04, 2014 11:14 |  #2

That's unusual. I use a 2x converter with my 1D Mark III and it slows the autofocus some, but it's still reasonably fast and quite usable. However, I have experienced slow down you describe on non 1D cameras.

What brand is the converter? I'm using the Kenko Pro without any problems.


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huntersdad
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Dec 04, 2014 11:56 as a reply to  @ Jon_Doh's post |  #3

Canon


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johnf3f
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Dec 04, 2014 18:27 |  #4

Check that you have the latest firmware for the 1D4, I believe there are some improvements in it for the Mk2 lenses.
I don't have any Mk2 SuperTeles (and don't have immediate access to any) but my friends 1D4 with a Canon 2 x Mk3 on a 600 F4 L IS Mk1 isn't too pedestrian. My 1DX is quicker but only a little, on the same combination.
When he tried his 1D4 on a 600 F4 L IS Mk2 and a 200-400 F4 L IS the AF was remarkably quick!


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huntersdad
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Dec 04, 2014 20:18 as a reply to  @ johnf3f's post |  #5

Firmware is 1.1.4, which is what Canon USA shows as the most recent. I'll play with it some more this weekend and see what I can get out of it.


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1D4 Af with 70-200II and 2x - Really this slow?
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