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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 10 Apr 2018 (Tuesday) 21:06
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Micro adjustment of lenses?

 
duckster
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Apr 10, 2018 21:06 |  #1

I see comments here and on reviews of some lenses that make reference to doing micro adjustments or calibration. Does this need to be done on each and every lens? Or just some types or if you notice a problem with your images? Thanks in advance




  
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Archibald
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Apr 10, 2018 22:15 |  #2

Some cameras do micro focus adjustments, some don't. Does yours?

A few years ago, no cameras did micro adjustments, and those cameras worked fine. Today's cameras that don't do MFA still work fine. And the ones that do MFA work fine if you don't do any MFA adjustments.

But in some cases, focus can be out a bit... in special cases, quite a bit. In these cases, you can do MFA to correct the focus and get real sharp photos.

It is up to you if you want to do all your lenses, or none, or just if you notice a problem. If you like diddling with gadgets, go ahead. Use the dot-tune method. It is not hard, and doesn't cost anything. If you think you are getting into trouble with the MFA, don't worry, you can do it again, or turn it off, and you will be back to the way it was.


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chuckmiller
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Apr 10, 2018 22:37 |  #3

In most cases MFA can/may improve focus but you usually have to zoom to 100% to see the difference. I think that's why before high mega pixels and peeping came to be popular people didn't notice the focus could be off slightly.


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TeamSpeed
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Apr 10, 2018 22:48 |  #4

chuckmiller wrote in post #18604325 (external link)
In most cases MFA can/may improve focus but you usually have to zoom to 100% to see the difference. I think that's why before high mega pixels and peeping came to be popular people didn't notice the focus could be off slightly.


Actually no, some lens/camera combos can be off significantly, to the point your focused subject falls outside the focal plane completely.

Also before there was this feature, back with 8Mpx bodies we would see this same issue and all we could do was send in our lenses and bodies to Canon so they could adjust them.


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Apr 10, 2018 23:44 |  #5

My lenses were all OK with my 7D2, except for the 100-400mm II when used with the 1.4X III. That combo was way out, needing about +13 notches. From what folks are saying, it is pretty common for the 100-400II/1.4III to require quite a bit of MFA.

I also have a 77D. It doesn't support MFA. I'm not too worried about it. I will test it when the weather improves here. If it's anything like the 7D2, the combo with the 1.4X will be out, but the other lenses will be good.


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Apr 10, 2018 23:55 |  #6

My camera bodies allow MFA. The way I think about it is that it gives you the ability to make a good thing even better. I use software test and adjust MFA for each body lens combination I have and I think just about every one of them has a small to medium correction.


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duckster
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Apr 11, 2018 10:13 |  #7

I have a 7D which is my primary camera and a T3i that I use as a "back up". I have not specifically noticed any focus issues, besides just me messing up. I just have seen this so often I got to wondering if it is something that I should look into, because it is really common. I bought my 7D used, from a friend and the T3i new




  
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Apr 19, 2018 15:16 |  #8

I have two cameras that allow MFA, never used it, my cameras seem to focus well without it.




  
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Apr 19, 2018 15:19 |  #9

I have had several cameras with AFMA, and with a myriad of Canon and 3rd party lenses, all needed varying levels of MFA to get the best out of them. The only commonality was that a camera needed roughly the same level of MFA for all the lenses (within +/-2 or 3 across lenses), meaning the camera was off. In the case where I had a lens that needed something like +15, that lens was therefore off.


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Apr 19, 2018 15:28 |  #10

Canonuser123 wrote in post #18609817 (external link)
I have two cameras that allow MFA, never used it, my cameras seem to focus well without it.

I've got 7D and 7DII and I've tried, really tried, to improve things with AFMA but just haven't been able to. It's off on both cameras. I don't know if that makes me lucky or I'm just not picky enough. Either way the results are sharp enough for me.




  
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duckster
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Apr 19, 2018 15:29 |  #11

Is this something that the local camera shop can do (for a price)?




  
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Apr 19, 2018 15:30 |  #12

duckster wrote in post #18609828 (external link)
Is this something that the local camera shop can do (for a price)?

Canon will do it.


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Apr 19, 2018 15:33 as a reply to  @ Archibald's post |  #13

So do you have to send in the lens? Maybe I am not even having enough of a issue to tell, considering I am not a great photographer, it could just be me when I get an OOF shot...




  
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Apr 19, 2018 15:36 |  #14

duckster wrote in post #18609831 (external link)
So do you have to send in the lens? Maybe I am not even having enough of a issue to tell, considering I am not a great photographer, it could just be me when I get an OOF shot...

You should be able to get very sharp pics by using a tripod and then using live view in good light. If that is unsuccessful, then there is a bigger problem than doing MFA.


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Apr 19, 2018 15:54 as a reply to  @ sidknee's post |  #15

I have a 7DmkII and a 5DmkIII, when I look at my photos on my computer the indicated focus point always seems to be the sharpest part of the photo.
As you said, I don't know if I am just lucky or maybe I am not as critical as some people, my printed photo look good to my eye.




  
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Micro adjustment of lenses?
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