October 23, 2014, 05:24:34 AM

Author Topic: 24L MkII focusing problems  (Read 975 times)

sold5

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24L MkII focusing problems
« on: July 24, 2014, 01:14:16 PM »
My 24L mkII is very accurate on my eos-M and when using when live view on my 5D mk3's but on the 5D's when not using live view the afma only works for one distance. All other distances are way out of focus.

For example, when focusing from about 20 ft I can amfa to get a decent result. Change to shoot from 10 ft and it misses by about a foot.

Would sending to Canon be likely to fix this? The lens is unuseable as is, I have had it for a couple of years but only started noticing the issue recently.

Thanks!

Steve
2x5D III, Samy 14/2.8, 15 fisheye, Tamron 17-35 f2.8-4, 24-70L II, 24-105L, 24LII, 35L, Sigma 35 Art, 40 pancake, 50L, 85LII, Sigma 85 1.4, 100L macro, 70-200L IS, 70-200L IS II, 300 F4L, Eos M + 22mm, 580ex II, 3x600ex-rt.  Fuji X-m1, X-Pro1, Fuji 14 f2.8, 18 f2, 23 f1.4, 27 f2.8, 35 f1.4, 56 f1.2

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24L MkII focusing problems
« on: July 24, 2014, 01:14:16 PM »

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Re: 24L MkII focusing problems
« Reply #1 on: July 24, 2014, 01:34:33 PM »
Why are you AFMAing at a target that is so far away?  For the 24L II, I adjusted AFMA for a target closer to 50x, which is 1.2m or 3-4 ft, and it works fine for much larger distances.

That said, I did have an issue with my 24L II where I it would not focus accurately at all even stopped down to f/5.6.  It did fine with LV, which bypasses the PDAF.  I would suggest trying to AFMA at a closer target and see if that fixes it.  If not, I would take a few shots showing your problem and send it to Canon with the lens.  They had to adjust my lens' AF mechanism.  The description of the work done was not more detailed than that but it did not imply that they had replaced any parts either...

mackguyver

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Re: 24L MkII focusing problems
« Reply #2 on: July 24, 2014, 01:43:32 PM »
Why are you AFMAing at a target that is so far away?  For the 24L II, I adjusted AFMA for a target closer to 50x, which is 1.2m or 3-4 ft, and it works fine for much larger distances.

That said, I did have an issue with my 24L II where I it would not focus accurately at all even stopped down to f/5.6.  It did fine with LV, which bypasses the PDAF.  I would suggest trying to AFMA at a closer target and see if that fixes it.  If not, I would take a few shots showing your problem and send it to Canon with the lens.  They had to adjust my lens' AF mechanism.  The description of the work done was not more detailed than that but it did not imply that they had replaced any parts either...
+1 on the calibration distance - unless you're using the large target, at least.  I have heard many stories about the AF on this lens, but I've had mine for 5 years now and it nails focus every time, no matter the distance.

LetTheRightLensIn

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Re: 24L MkII focusing problems
« Reply #3 on: July 24, 2014, 02:20:09 PM »
I've heard stories of claimed terrible problems, mostly when paired with the 7D.

My copy was great on 5D2/5D3 and pretty good on 7D though.
« Last Edit: July 24, 2014, 04:25:12 PM by LetTheRightLensIn »

mackguyver

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Re: 24L MkII focusing problems
« Reply #4 on: July 24, 2014, 02:21:07 PM »
I've heard stories, mostly when paired with the 7D.

My copy was great on 5D2/5D3 and pretty good on 7D.
I guess that makes sense - I have never used mine on anything but a 5D2 or 3 as well. 

alexturton

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Re: 24L MkII focusing problems
« Reply #5 on: July 24, 2014, 03:13:42 PM »
I have the same problem with the 24l ii. Wildly inaccurate focussing and afma only corrected at one distance. I sent my copy back and got a new one. New copy nails focus all the time every time
Bodies: 5d mk iii, 60d
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alexturton

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Re: 24L MkII focusing problems
« Reply #6 on: July 24, 2014, 03:14:03 PM »
I was using 5d3 and 7d
Bodies: 5d mk iii, 60d
Primes: 24L 1.4, Sigma 35 1.4, 40 pancake, 50L 1.2, 85L 1.2 ii, 8mm fisheye, lensbaby, 100L macro.
Zooms: 16-35 2.8 ii, 24-70 2.8 ii, 70-200 2.8 is ii, 120-400

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Re: 24L MkII focusing problems
« Reply #6 on: July 24, 2014, 03:14:03 PM »

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Re: 24L MkII focusing problems
« Reply #7 on: July 24, 2014, 03:22:57 PM »
Why are you AFMAing at a target that is so far away?  For the 24L II, I adjusted AFMA for a target closer to 50x, which is 1.2m or 3-4 ft, and it works fine for much larger distances.

That said, I did have an issue with my 24L II where I it would not focus accurately at all even stopped down to f/5.6.  It did fine with LV, which bypasses the PDAF.  I would suggest trying to AFMA at a closer target and see if that fixes it.  If not, I would take a few shots showing your problem and send it to Canon with the lens.  They had to adjust my lens' AF mechanism.  The description of the work done was not more detailed than that but it did not imply that they had replaced any parts either...

My issue was found on a 5DII and confirmed on a 7D.

sold5

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Re: 24L MkII focusing problems
« Reply #8 on: July 24, 2014, 06:05:13 PM »
Thanks for the replies.

 I did the afma at about 4 ft and it definitely helped for longer distances. It's late in Ireland now so will try in better light.

Cheers,

Steve
2x5D III, Samy 14/2.8, 15 fisheye, Tamron 17-35 f2.8-4, 24-70L II, 24-105L, 24LII, 35L, Sigma 35 Art, 40 pancake, 50L, 85LII, Sigma 85 1.4, 100L macro, 70-200L IS, 70-200L IS II, 300 F4L, Eos M + 22mm, 580ex II, 3x600ex-rt.  Fuji X-m1, X-Pro1, Fuji 14 f2.8, 18 f2, 23 f1.4, 27 f2.8, 35 f1.4, 56 f1.2

StudentOfLight

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Re: 24L MkII focusing problems
« Reply #9 on: July 25, 2014, 07:06:50 PM »
Hi Steve, is the issue sorted?
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sold5

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Re: 24L MkII focusing problems
« Reply #10 on: July 28, 2014, 03:57:43 PM »
Hi Steve, is the issue sorted?

Hi StudentOfLight,

Definitely a lot better now, I did some testing in good light today and am pretty happy with the performance vs live view. I'm probably spoiled by some of the other lenses in my arsenal - just updated my profile with the full list. The fuji lenses at f1.2 to 1.4 are really sharp wide open so I'm probably setting the bar high for the 24 which is known to be a bit soft at f1.4
2x5D III, Samy 14/2.8, 15 fisheye, Tamron 17-35 f2.8-4, 24-70L II, 24-105L, 24LII, 35L, Sigma 35 Art, 40 pancake, 50L, 85LII, Sigma 85 1.4, 100L macro, 70-200L IS, 70-200L IS II, 300 F4L, Eos M + 22mm, 580ex II, 3x600ex-rt.  Fuji X-m1, X-Pro1, Fuji 14 f2.8, 18 f2, 23 f1.4, 27 f2.8, 35 f1.4, 56 f1.2

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Re: 24L MkII focusing problems
« Reply #10 on: July 28, 2014, 03:57:43 PM »