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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 07 Sep 2016 (Wednesday) 13:53
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-= 5D Mark IV owners unite! Post photos and discuss.

 
digital ­ paradise
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Jan 20, 2017 23:08 |  #1591

SereneSpeed wrote in post #18250960 (external link)
Adjusting the MFA doesn't work? The first looks back focused and the last looks front focused. All of my lenses needed different AMFA numbers on my 5D4.

You made a key statement. Back and front focusing. If that is happening with one lens MFA will do nothing to help.


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graham121
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Jan 20, 2017 23:40 |  #1592

digital paradise wrote in post #18250975 (external link)
You made a key statement. Back and front focusing. If that is happening with one lens MFA will do nothing to help.

I think they were both shot with different lenses, first was a 24-70, second a 50. Would be interetedto know in what shutter speeds were used.


A coupla bodies and a few lenses

  
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Jan 21, 2017 00:26 |  #1593

Maureen Souza wrote in post #18250918 (external link)
Enough for me to be unhappy. One of these is taken with my 24-70/2.8 lens at f/4. The other is taken with my 50mm/1.4 at f/3.2
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Hosted photo: posted by Maureen Souza in
./showthread.php?p=182​50918&i=i113271848
forum: Canon EOS Digital Cameras

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Hosted photo: posted by Maureen Souza in
./showthread.php?p=182​50918&i=i45517654
forum: Canon EOS Digital Cameras

Yes, that needs to be fixed. My 5D4 is excellent with my 16-35 f/4, 24-105 f/4, and 100-400 II without any MFA on any of the lenses.


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Maureen ­ Souza
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Jan 21, 2017 01:30 as a reply to  @ post 18250929 |  #1594

Thanks....she is my only granddaughter in a parcel of 4 grandsons. Luckily my 5D3 is still doing a great job.


Life is hard...but I just take it one photograph at a time.

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Maureen ­ Souza
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Jan 21, 2017 01:31 as a reply to  @ graham121's post |  #1595

Shutter speed was 125 on both shots.


Life is hard...but I just take it one photograph at a time.

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Maureen ­ Souza
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Jan 21, 2017 01:33 as a reply to  @ post 18250960 |  #1596

According to Canon, I should not have to do that for any of my lenses. The lenses all work fine on my 5D3 with no micro-adjustment so I am not willing to mess around with them.


Life is hard...but I just take it one photograph at a time.

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Maureen ­ Souza
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Jan 21, 2017 01:36 |  #1597

LJ3Jim wrote in post #18251005 (external link)
Yes, that needs to be fixed. My 5D4 is excellent with my 16-35 f/4, 24-105 f/4, and 100-400 II without any MFA on any of the lenses.

Yes, I agree!!! I have owned an original 5D, a Mk 2, two Mk3s & never have had to microadjust anything. The lens will be at UPS tomorrow & we will see what happens from there.


Life is hard...but I just take it one photograph at a time.

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SereneSpeed
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Jan 21, 2017 02:30 as a reply to  @ Maureen Souza's post |  #1598

With respect, it is not a given that you will not need to AFMA lenses. Either there was a miscommunication between you and Canon, or whomever you spoke to was wrong. Lens and camera body combinations are not exact. Although a lot of the time, acceptable results can be had without any adjustment, AFMA is often required to get the best performance.

My last pair of 5DmkIII's required unique AFMA settings for each of my lenses. Not only that, but there was no correlation between the values for each camera. A particular lens may have needed a positive adjustment on one camera and a negative on the other. And, to my surprise, another lens may have needed to be adjusted the same to work best on both bodies. There are too many fine tolerances at play in the AF system.

My 5DmkIV has it's own unique set of AFMA numbers for each of my lenses. Yes, many lenses will work just fine out of the box. But some lenses behave just like your first example photo in your post with your example images. All but one of my lenses has needed AFMA to perform at it's best. I have had 15 (maybe more) Canon L, or Sigma Art lenses over the past five years and only one has not improved with AMFA.

Your Camera has AFMA so you can remove fine inconstancies in production tolerances. You mention that you are "not willing to mess around with them". I am not saying you should be the one to do it. However, please know that there is a good chance that AFMA adjustment will fix your issues. It is possible, even likely, that your camera is well within production tolerances and behaves like all the other 5DmkIV's out there.

Adjusting AFMA does not make any physical changes to any of your gear. It is just a way of telling your camera that when it thinks it is in focus, it is actually not. In your fist photo you posted aboive, you may want to try adjusting your AFMA value to -3, or even -5 (for that lens, either your 24-70, or your 50) to see if your images improve. At any time, you can change the setting back to zero.

Deciding on an AFMA number is a bit like finding be best prescription for a new set of glasses. A particular lens and camera combination may be a bit nearsighted, or a bit farsighted (just an analogy) and setting the AFMA number correctly is like giving the AF system a pair of glasses that restores it's perfect 20/20 vision. You can always take the glasses off if it's not working.

Either way, best of luck sorting it all out.


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welshwizard1971
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Jan 21, 2017 03:42 |  #1599

If canon lenses dont need MFA, why does canon include it? You can guarantee it's not to make third party lenses work better.


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manderson
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Jan 21, 2017 04:43 |  #1600

welshwizard1971 wrote in post #18251057 (external link)
If canon lenses dont need MFA, why does canon include it? You can guarantee it's not to make third party lenses work better.

I still say it's marketing hype. I've seen so many posts about a lens that had to be set to +/- 10 and every conversation with techs at CPS said that a lens that needs that much MFA should be sent back for calibration. Guess I've been lucky with all of my lenses, but if there is ever a problem, they will be sent to CPS. I have never touched MFA and never will. It might do something, but it's a band-aid imho.




  
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George ­ Zip
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Jan 21, 2017 05:05 |  #1601

manderson wrote in post #18251072 (external link)
I still say it's marketing hype. I've seen so many posts about a lens that had to be set to +/- 10 and every conversation with techs at CPS said that a lens that needs that much MFA should be sent back for calibration. Guess I've been lucky with all of my lenses, but if there is ever a problem, they will be sent to CPS. I have never touched MFA and never will. It might do something, but it's a band-aid imho.

I had a 50mm that was pretty bad. It just did not wanna focus. it needed +20 which is a lot which seemed to fix it.

But same.... all my other lenses are less than 5.




  
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George ­ Zip
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Jan 21, 2017 05:07 |  #1602

Maureen Souza wrote in post #18251029 (external link)
According to Canon, I should not have to do that for any of my lenses. The lenses all work fine on my 5D3 with no micro-adjustment so I am not willing to mess around with them.

That's a strange thing for Canon to say.

Might be worth experimenting, the changes can be reset.

Regardless, I hope you get it sorted out, it must be very annoying and frustrating.




  
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George ­ Zip
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Jan 21, 2017 05:24 |  #1603

manderson wrote in post #18251072 (external link)
I still say it's marketing hype. I've seen so many posts about a lens that had to be set to +/- 10 and every conversation with techs at CPS said that a lens that needs that much MFA should be sent back for calibration. Guess I've been lucky with all of my lenses, but if there is ever a problem, they will be sent to CPS. I have never touched MFA and never will. It might do something, but it's a band-aid imho.

I don't think it's marketing hype. I have never seen it as a headline feature and also Nikon have it.

Micro is the operative word. We are talking very small increments. It is just to adjust for manufacturing tolerances. I like the fact you can calibrate it yourself as opposed to have to send it to a tech.

If you shoot at F4 for eg, I doubt you would ever even notice if the Lens Body combo is front focusing or back focusing. Even 2.8 is marginal from my observation. It seems to be more prevalent for 1.8 and below.

I adjusted all my lenses. I just like to know that if there is a problem, it is me that is the issue not the gear.

Having said all that, I think that shooting technique is far more of an issue the MF when shooting wide open. Since having the 5D4 and it's amazing focus system, it is helping me far more than anything else.




  
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Chet
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Jan 21, 2017 08:59 |  #1604

I agree on the 50f1.4 needing. Mine is definitely temperamental and does not give consistent results. I did make adjustments on mt 1dmkiii, and it helped.




  
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TRhoads
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Jan 21, 2017 10:00 |  #1605

My 50 1.4 was all.over the place...on my 7D it was front focusing and on my 5D2 it was back focusing...the guy that bought it said it was dead on with his camera...so MFA is a good thing...a PITA though....


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