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Author Topic: 5D MkIII - AFMA due consistent backfocusing  (Read 1767 times)

jondave

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5D MkIII - AFMA due consistent backfocusing
« on: August 20, 2012, 12:10:34 AM »
Just wondering if any of you have experienced consistent back/front focusing with your bodies? I know that's what AFMA is for, but all my lenses have a plus (+) adjustment on my 5D3, e.g., my Sigma 50mm 1.4 and my Canon 16-35mm II 2.8 both have +20 dialled in.

Should I bring the body to the service center for a check?

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5D MkIII - AFMA due consistent backfocusing
« on: August 20, 2012, 12:10:34 AM »

revup67

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #1 on: August 20, 2012, 01:11:34 PM »
I had a +20 on my Canon 1.4.  I had much lower adjustments on my other lenses (all L series) varying from 1-8 in either direction.  The 100mm L 2.8 was at zero.  I recall reading a blurb in Focal (presuming that is what you are using) that non L lenses could cause a larger sway in front or back focusing but don't recall the specifics other than this and that L glass will offer a more incremental changes.

You could write to Rich at Focal on this or review the section in the manual about the non L glass
Thanks
Rev
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neuroanatomist

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #2 on: August 20, 2012, 01:19:41 PM »
If a +20 isn't enough, you need to send body and lenses to Canon (except the Siggy, of course...).
EOS 1D X, EOS M, and lots of lenses
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jondave

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #3 on: August 20, 2012, 08:37:07 PM »
There's an 'adjust all lens by the same amount' option - is this this in addition to the individual lens adjustment? i.e., does a +5 here and a +20 on the individual lens equate to a +25 adjustment? Or does any adjustment here override the individual lens adjustment?

neuroanatomist

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #4 on: August 20, 2012, 09:14:11 PM »
They're separate and not additive. Whichever you select in the menu is the one that's applied.
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Tim Larsen

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #5 on: August 20, 2012, 09:21:52 PM »
Are you CPS at all?

If you are CPS, send it in.  If not, then let your budget decide.

fallenflowers

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #6 on: August 22, 2012, 10:54:24 PM »
Are you CPS at all?

If you are CPS, send it in.  If not, then let your budget decide.

What about  1 year manufacture warranty?

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #6 on: August 22, 2012, 10:54:24 PM »

macrodust

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #7 on: August 23, 2012, 05:45:42 AM »
My MkIII is consistently front focussing and my lenses all needed adjustments between +3 and +11. AFMA do work wonders though!
EOS 5D Mark III | EOS 7D | EFS 10-22mm f/3.5-4.5 | EF 17-40mm f/4L | EF 24-105mm f/4L IS | EF 70-300mm f/4-5.6L IS | EF 135mm f/2L | EF 100mm f/2.8L IS Macro | EF 85mm f/1.8 | EF 50mm f/1.4 | EF 40mm f/2.8 Pancake | EF 28mm f/1.8 | Sigma 50mm f/1.4 Art | Sigma 35mm f/1.4 Art

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Re: 5D MkIII - AFMA due consistent backfocusing
« Reply #7 on: August 23, 2012, 05:45:42 AM »