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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 02 Nov 2014 (Sunday) 22:09
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Canon 1DX AF Problem

 
N2bnfunn
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Nov 02, 2014 22:09 |  #1

Hello I have a 1DX with the latest firmware 2.03 installed, but I have noticed that my autofocus is off on all my L lens, so I went into the menu and manually set to -14 for all lens, that seem to correct the problem, Just wondering anyone else with a 1DX having this same problem.


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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apersson850
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Nov 03, 2014 00:49 |  #2

The only lens I have that requires adjustment in a similar range is the EF 50 mm f/1.4 USM. But then it takes adjustments on all cameras I have, and isn't useful with AF on the bodies which don't have microadjustment, so that lens is clearly out of specifications. Now microadjustment saves it, so I've not returned it for calibration, but in the old days that would have been necessary.
Some of my other lenses, L or not, also need some calibration, some don't.


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Nov 03, 2014 01:37 |  #3

So if -14 fixes ALL your lenses and makes them work perfectly... what's the issue again?


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N2bnfunn
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Nov 03, 2014 11:32 |  #4

I was just wondering if anyone else 1DX is having the same problem...


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Keyan
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Nov 03, 2014 18:31 |  #5

Sounds like an alignment issue. Did it just start happening?


Cameras: 7D2, S100
Lenses: 17-55 f/2.8 IS USM, 18-135 STM, 24-70 f/4L IS USM, 50 f/1.4 USM,70-300L IS USM
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blanex1
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Nov 03, 2014 18:51 |  #6

Keyan wrote in post #17250406 (external link)
Sounds like an alignment issue. Did it just start happening?

a alignment issue whats this ! front and back focus i no of but please describe alignment and what causes it.and one would fix it!.:o


canon 7d bg-e7 5d-mk3 1d-mk3 24-105-L 17-40 L 35/1.4 85/1.8 yougnuo 565 ex 580 ex and lots of other canon stuff.canon 70-200 2.8 L

  
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Keyan
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Nov 03, 2014 19:16 |  #7

Out of focus shots requiring MFA to correct are usually because of slight differences in the light path when the mirror is down and light is hitting the focusing screen and the AF sensor vs when the mirror is up and light hits the imaging sensor. Canon uses small shims and maybe screws to align the parts and get the light paths to be as identical as possible, but there can still be variances with the parts or the lens that requires a small amount of tweaking - if all of the lenses require a strong amount of MFA and the same amount then I would guess that a component has become misaligned (sensor, mirror, focus sensor) and Canon should be able to correct it..for a fee if it isn't under warranty of course.


Cameras: 7D2, S100
Lenses: 17-55 f/2.8 IS USM, 18-135 STM, 24-70 f/4L IS USM, 50 f/1.4 USM,70-300L IS USM
Other Stuff: 430 EX II, Luma Labs Loop 3, CamRanger

  
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apersson850
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Nov 04, 2014 02:31 as a reply to  @ Keyan's post |  #8

Still, when this misalignment is well inside what can be corrected by using the AF microadjustment (so much easier if the same amount works with all lenses), then isn't that exactly what the AF microadjustment was developed for in the first place? So you can fix this yourself, without having to ship the camera anywhere?

The result would be the same, regardles of whether it works as it should at 0 setting or at 15.


Anders

  
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Keyan
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Nov 04, 2014 06:52 |  #9

It limits your flexibility in the event that you need to adjust a lens much more :)

MFA was designed originally as a way for photographers to adjust their focus for lenses in the field, it wasn't meant as a replacement for service or calibration - although in practice it has been expanded to be that now.


Cameras: 7D2, S100
Lenses: 17-55 f/2.8 IS USM, 18-135 STM, 24-70 f/4L IS USM, 50 f/1.4 USM,70-300L IS USM
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apersson850
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Nov 04, 2014 09:28 as a reply to  @ Keyan's post |  #10

That's true, of course.

I'll bet a substantial amount of Italian lira that someone at Canon originally thought "Let's market this as something to set specific conditions in the field, but we know very well it will cut the top of our calibration costs!"


Anders

  
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N2bnfunn
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Nov 05, 2014 01:08 |  #11

I sent it to canon for cleaning and after that I noticed the problem, looks like I need to sent it back to them for a adjustment


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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timbop
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Nov 05, 2014 06:38 |  #12

The micro adjust feature is built in to the camera because it is difficult to get absolute perfect alignment, so you can accomplish in software what is imperfect in hardware. There is no issue with your camera.


Current: 5DM3, 6D, 8mm fish, 24-105/4IS, 35/2IS, 70-200/2.8IS, 85/1.8, 100-400/IS v1, lensbaby composer with edge 80, 580's and AB800's
Formerly: 80D, 7D, 300D, 5D, 5DM2, 20D, 50D, 1DM2, 17-55IS, 24-70/2.8, 28-135IS, 40/2.8, 50/1.8, 50/1.4, 70-200/4IS, 70-300IS, 70-200/2.8, 100 macro, 400/5.6, tammy 17-50 and 28-75, sigma 50 macro & 100-300

  
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Canon 1DX AF Problem
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