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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 15 Apr 2012 (Sunday) 11:28
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How fast is the 5D3 AF system?

 
Moody ­ Blues
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Apr 15, 2012 11:28 |  #1

I currently own a 5D2 and despise the AF Servo system. I owned 2 1D bodies in the past and wish I would have never sold them.

I now have the 1DX on order but it looks like the camera will not be ready for a 3 week Europe trek we have planned for the first of June. I don't mind picking up a 5D3 in the meantime as I have read that camera has the same AF system. I would like to know if the AF servo is as fast though as what I had in a 1 series body.


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S.Horton
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Apr 15, 2012 11:45 |  #2

I hopped a 5DIII thread and basically asked the same question.

It might be as fast; probably fast enough to get things done.

https://photography-on-the.net …/showthread.php​?t=1173458
https://photography-on-the.net …/showthread.php​?t=1167866


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rick_reno
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Apr 15, 2012 12:09 |  #3

Here's a video that might help...

http://www.youtube.com …text=G2fdbbceFA​AAAAAAAEAA (external link)




  
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jase1125
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Apr 15, 2012 14:15 |  #4

Every bit as fast as my 1D Mark IV. The only way the 1D bests it was auto focusing lenses with lots of heavy glass like the 85 1.2. That is only because of the larger battery. Otherwise, I find the 5d3 equal and in some instances better.


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sempaidavid
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Apr 15, 2012 14:55 |  #5

I find it better than my 1D mkIV as well.


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tigerotor77w
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Apr 15, 2012 15:04 |  #6

Some examples (not necessarily comparing the 5D3 AF to 1D AF, however):

https://photography-on-the.net …/showthread.php​?t=1171929
https://photography-on-the.net …/showthread.php​?t=1163659
Forgot which parent thread this was in: https://photography-on-the.net …p?p=14187893&po​stcount=13


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Mike ­ K
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Apr 15, 2012 22:05 |  #7

The 1D X and 5DIII use the identical AF sensor and the identical dedicated processor for this AF sensor. The exposure sensor between these two cameras is different and the color information from the 1D X exposure sensor is used to help AI servo tracking by using color to identify the subject. However the focusing function is identical and surely an improvement over all previous 1D or 5D bodies.


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ccp900
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Apr 15, 2012 22:35 |  #8

wait wait...sorry if ive been living under a rock...but has canon confirmed that the 5d3 also uses a standalone dedicated chip for AF like the 1dx??


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themadman
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Apr 15, 2012 23:43 |  #9

ccp900 wrote in post #14272440 (external link)
wait wait...sorry if ive been living under a rock...but has canon confirmed that the 5d3 also uses a standalone dedicated chip for AF like the 1dx??

It does have a stand alone chip. Not a Digic 4 chip, but it does have a dedicated AF chip. I am guessing it doesn't need as powerful of a chip as the 1Dx due to the lack of subject based af which the 1Dx does have.

As to it's speed, fast... VERY fast.


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Moppie
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Apr 15, 2012 23:57 |  #10

I've been at a pre-launch demo of the 5D3 and 1DX held by Canon NZ.

The 5D3 and 1DX both share the same AF system, the only difference is the 5D3 does not have the shape and colour recognition that is in the 1DX.

This means the 5D3 has in theory, a better AF system than any 1 series camera currently on sale and when the 1Dx is finally released, will have an AF system that is 99% as capable.


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stargazer78
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Apr 16, 2012 00:10 as a reply to  @ Moppie's post |  #11

5D3 and 1DX use the exact same AF sensor, and run the exact same AF algorithm. Both cameras have a dedicated (un-named) AF processor. The dedicated AF processor on the 5D3 is four times faster than the one on the 1D Mark IV. But Canon has not yet explicitly said whether or not this processor is identical to the one on the 1D X. (I'm guessing it is, since they haven't said it isn't).

According to Canon, there are two differences between the Auto Focus systems of 5D3 and 1D X.

  • When A.I. Servo is used with 61-pt Automatic Selection, the 1D X is capable of tracking subjects by face and color. This helps the camera to more accurately switch between AF points as the subject moves across the frame. The 1D X does not use color tracking in any other modes. This means that for A.I. Servo with single point, spot, 4-pt expansion, 8-pt expansion, and Zone AF the two cameras are operationally identical.
  • The 1D X has a more powerful battery than the 5D3. This allows the 1D X to drive the AF motors of certain very large telephoto lenses faster than a 5D3 can.



  
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ccp900
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Apr 16, 2012 03:58 |  #12

thanks guys!!


[Sony A7R Mark 3 | Sony A7S | Sony Zeiss 16-35m f/4.0 | Zeiss Batis 40m f2 | Sony FE 28m f2 | Sony Zeiss 55m f1.8 | Sony FE 28-70m f/3.5-5.6 | Helios 44-2 | Helios 44-3 | Nikon 105m f/2.5 AIS | Contax Zeiss Planar 50m f1.7 | Contax Zeiss Planar 100m f2 | Voigtlander Nokton 40m f/1.4 | Canon 24-105m f/4.0L | Canon 85m f/1.8 | Sigma 30m f/1.4 | Canon 10-22m f/3.5-4.5 | Canon 100m f/2.8 Macro USM | Canon 580 EX Ver 1.0]

  
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Higgs ­ Boson
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Apr 16, 2012 07:13 |  #13

My 5Diii is so good it prefocuses on places where objects will be.

I'm like, Hey, what the? Ohhhhh.


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ccp900
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Apr 16, 2012 07:59 |  #14

but does it make waffles??


[Sony A7R Mark 3 | Sony A7S | Sony Zeiss 16-35m f/4.0 | Zeiss Batis 40m f2 | Sony FE 28m f2 | Sony Zeiss 55m f1.8 | Sony FE 28-70m f/3.5-5.6 | Helios 44-2 | Helios 44-3 | Nikon 105m f/2.5 AIS | Contax Zeiss Planar 50m f1.7 | Contax Zeiss Planar 100m f2 | Voigtlander Nokton 40m f/1.4 | Canon 24-105m f/4.0L | Canon 85m f/1.8 | Sigma 30m f/1.4 | Canon 10-22m f/3.5-4.5 | Canon 100m f/2.8 Macro USM | Canon 580 EX Ver 1.0]

  
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Moody ­ Blues
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Apr 16, 2012 08:41 as a reply to  @ ccp900's post |  #15

This is all very helpful info. I am considering placing an order for the 5D3 from BH today. Does anyone have any guesses how long orders are taking to fill these days?

I may keep my 1DX order open for the time and see what happens in another month.


1DX / 24L II / 35L / 85L II / 100L Macro / 16-35L II / 24-70L II / 70-200L II / 1.4x III TC / 600EX-RT

  
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How fast is the 5D3 AF system?
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