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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 16 Mar 2015 (Monday) 10:18
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Auto focus problem 1DX

 
N2bnfunn
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Mar 16, 2015 10:18 |  #1

Hello I have a 1DX with the latest firmware installed on it, the problem I am having is with one lens 24-70II, for some reason that lens will not auto focus correctly but all the other lens I use on that camera seen to work just fine.
At first I thought it was the lens itself, so I placed it on my 5DIII and it works and focuses just fine so it is not the lens.


Anyone else having problem with 24-70 II and their 1DX?


Canon EOS R EF 70-200 L 2.8 L 24-70 2.8L II Canon Pixma PRO-1 3 Canon 600EX-RT Speedlites

  
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rrblint
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Mar 16, 2015 12:16 |  #2

Have you tried MFA?


Mark

  
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apersson850
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Mar 16, 2015 12:19 |  #3

The only AF-related problem I've ever had with my 1DX is that it doesn't focus correctly when I put my EF 50 mm f/1.4 USM on it. But then neither does any other camera I have. Cameras supporting micro adjust (in my bags 7D and 1DX) fixes this by an adjustment, but those without can't use AF with that particular lens.


Anders

  
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sdipirro
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Mar 16, 2015 15:38 |  #4

Never had a problem with my 24-70 II on the 1DX.


Cameras: 1DX, 1D4, 20D, 10D, S90, G2
Lenses: Canon 10-22mm, 16-35mm f2.8L II, 24-70mm f2.8L, 70-200mm f2.8L IS, 300mm f2.8L IS, 200mm f2L IS, 50mm f1.4, 50mm f1.2L, 85mm f1.2L, 1.4x TC, 2x TC, 500D macro, Zeiss 21mm
Lighting: 580EX, Elinchrom 600 RX's, D-Lite 4's, ABR800, 74" Eli Octa, 100cm/70cm DOs, Photoflex Medium Octa and reflectors, PW's, Lastolite Hilite, Newton Di400CR bracket

  
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James ­ P
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Mar 17, 2015 05:41 |  #5

I've never had a problem with my 1Dx and 24-70II so I'll be interested in the outcome of this problem.


1Dx - 5DIII - 40D - Canon 24-70LII, 100L macro, 135L, 16-35L, 70-200 f4 and 100-400L lenses

- "Very good" is the enemy of "great." Sometimes we confuse the two.

  
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sploo
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Post edited over 4 years ago by sploo. (2 edits in all)
     
Mar 17, 2015 06:46 |  #6

N2bnfunn wrote in post #17477330 (external link)
Hello I have a 1DX with the latest firmware installed on it, the problem I am having is with one lens 24-70II, for some reason that lens will not auto focus correctly but all the other lens I use on that camera seen to work just fine.
At first I thought it was the lens itself, so I placed it on my 5DIII and it works and focuses just fine so it is not the lens.


Anyone else having problem with 24-70 II and their 1DX?

By "will not auto focus correctly" do you mean it hunts (and never locks), locks but almost always misses, or something else?

If it locks (in one shot AF mode) then put it on a tripod, point it at a fixed target (e.g. a newspaper) and see how it focusses through the viewfinder (phase AF) vs through Liveview (contrast AF). If it seems to focus ok in Liveview, then as others have suggested, it's likely to need some MFA.

I found the DotTune (http://www.fredmiranda​.com/forum/topic/11872​47 (external link)) method to be pretty easy and not too time-consuming.

Note that if you can get them working together with MFA then there's likely to be nothing wrong with either the body or lens; every unit will be within a certain +/- tolerance. When you're unlucky enough to get both a body and lens that are towards the (same) acceptable end of the +/- scale then the combination can cause problems. The same lens on a different body (which will likely be somewhere else within that +/- tolerance range) could be fine; even though all the units in question are technically "fine".

As a simplistic example: if -20...20 is considered acceptable and you have a lens at -7 and body at +3, the result is -4 (OK). A +15 lens and a -5 body is +10, so also OK. A -9 lens and a -14 body is -23, so could be a problem at wide apertures. All those lenses and bodies though are within the "acceptable" -20...20 tolerance range on their own.


Camera, some lenses, too little time, too little talent

  
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N2bnfunn
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Mar 21, 2015 10:39 |  #7

I talked to a Canon Rep and he told me to trying doing a factory reset and that should fix the problem and if not do a micro adjustment to correct the problem on that lens.


Canon EOS R EF 70-200 L 2.8 L 24-70 2.8L II Canon Pixma PRO-1 3 Canon 600EX-RT Speedlites

  
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Auto focus problem 1DX
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