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Occasional Contributor
Posts: 13
Registered: ‎03-28-2016

micro adjustment results for canon 7D with 70-200 2.8 IS USM II

I would appreciate any help. Not an expert on the subject. Pictures come out very soft, have a hard time adjusting camera & lens. I know that each lens and camera in sync would give different results, but any numbers for MA specially at 200 mm. Thank you to memebers of the forum for the help.

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Super Contributor
Posts: 252
Registered: ‎11-11-2012

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II

7D or 7D2? What method are you using to MFA? That lens with my 7D2 needs the most MFA out of any Canon I have owned and I have to say I was not impressed. I sent to Canon and they found a misclbrated board. It is better but stll way out to much for my liking.

 

My MFA numbers are 70mm = +3 and 200mm = +11. Even my 100-400 II only needs +4 at 400.        

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Posts: 9,928
Registered: ‎08-13-2015

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II


@Falketimages wrote:

I would appreciate any help. Not an expert on the subject. Pictures come out very soft, have a hard time adjusting camera & lens. I know that each lens and camera in sync would give different results, but any numbers for MA specially at 200 mm. Thank you to memebers of the forum for the help.


Do a web search for "Dot Tune Method".  If you get a hit for a YouTube video called " DotTune: Autofocus fine tuning in under 5 minutes", then that is the one to check out.  Download and print out a focus chart if you can, too.  

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"Doctor told me to get out and walk, so I bought a Canon."
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Super Contributor
Posts: 252
Registered: ‎11-11-2012

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II

Just wanted to add. Currently with my 5D3 it is -1 and +7. Before sending it in it was +14 with the 5D3  and it would go over +20 with my 7D2. That was usng Dot Tune. After the repair I started to use FoCal but Dot Tune works well.      

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Posts: 9,928
Registered: ‎08-13-2015

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II


@digital wrote:

Just wanted to add. Currently with my 5D3 it is -1 and +7. Before sending it in it was +14 with the 5D3  and it would go over +20 with my 7D2. That was usng Dot Tune. After the repair I started to use FoCal but Dot Tune works well.      


Yes, there seems to be some quality control issues on the EF 70-200mm f/2.8L IS II USM.

 

My recently purchased lens is the same way.  In fact, I had to send the first one back because of a loose fit on my 6D.  It actually rattled as you tilted the camera up and down.  The second one fit properly.  It should never be absolutely snug, because the lens and camera need room to breath for thermal contraction and expansion. 

 

However, I think my first lens may have been missing the rubber ring, or grommet, that provides the weather sealing around the connection to the camera body.  Last time I'l buy anything from the Big Box store, in the Big Blue buildings, which is supposed to be a reputable Canon dealer.  I don't blame Canon.  I blame the store chain for poor security, and quality control.  I think my first lens had been an open box return.  I suspect someone needed that rubber ring.

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"Doctor told me to get out and walk, so I bought a Canon."
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Super Contributor
Posts: 252
Registered: ‎11-11-2012

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II

They may have had a bad batch. I have spent a of money on Canon gear and this is only piece of gear on my I'm not thrilled with it list. I use it but it bugs me. I don't want to sell it because I like the raneg and 2.8/. If I do and replace it it I'll lose money.             

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Respected Contributor
Posts: 1,971
Registered: ‎02-26-2015

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II


@Falketimages wrote:

I would appreciate any help. Not an expert on the subject. Pictures come out very soft, have a hard time adjusting camera & lens. I know that each lens and camera in sync would give different results, but any numbers for MA specially at 200 mm. Thank you to memebers of the forum for the help.


There are no set numbers for Micro Focus Adjustment (MFA). 

 

That is the whole point of MFA there are going to be some variations between lens and camera due to manufacturing tolerances. 

 

If both those variations in camera and lens offset each other you might not even notice them. However if both those varitions amplify each other it is really noticible. If it is correctable with MFA there really isn't anything wrong or bad with the camera or lens.

 

You've gotten good advice to Google for the DotTune method of MFA, as that works well. 

 

You want to MFA in the kind of light and distances you'll normally be using the camera, Which means if you are photographing football, don't MFA in your house, and expect it to be spot on at the field. That's one reason why I like the DotTune method as you can use it anywhere you have a tripod and a sign to use as a focus target.

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VIP
Posts: 12,714
Registered: ‎12-07-2012

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II

My ef 70-200mm f2.8L II required nothing. It is perfect. Smiley Happy

EOS 1DX and 1D Mk IV and several lenses!
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Super Contributor
Posts: 252
Registered: ‎11-11-2012

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II

You are lucky. I got a lemon. 

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Posts: 12,714
Registered: ‎12-07-2012

Re: micro adjustment results for canon 7D with 70-200 2.8 IS USM II

Bummer! Smiley Sad

EOS 1DX and 1D Mk IV and several lenses!
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