Canon Community Canon Community

Forum Elite
Posts: 14,317
Registered: ‎12-07-2012

Re: 70-200 2.8 - Focusing Issue

Now the truth about AFMA.  It does not make, not one tiny bit, you lens any sharper.  This is impossible unless a mechanical part is changed, removed or replaced, once the lens is constructed.  What it does is move the critical focus point in or out.  You can get it so far off you are not actually focusing on what you think you are. Set it back to zero and do my test.

EOS 1DX and 1D Mk IV and several lenses!
Frequent Contributor
Posts: 26
Registered: ‎09-25-2016

Re: 70-200 2.8 - Focusing Issue

@ebiggs1 wrote:

"P.S: The lens has been calibrated (at home) and the photos still come out like this:"


This is almost assuredly the issue.  People misuse this feature all the time.  Set it back to zero. Now reset the 70D to factory. Menus, tools, clear all settings and clear all custom settings.  Now set the 70D to "P" mode. Set ISO to 200 and daylight WB. Use One shot and do not use BBF or Ai-servo. Do use just the center focus point.  Now tale some random shots out side on a nice sunny day.  Make sure there are some vertical lines in you test sample shots like trees or a fence or buildings, etc.


If it works, it works and you set or set something incorrectly. If you still get OOF shots call Canon.1 (800) 652-2666 Set up a  C&C for the lens.


BTW, you always shoot Raw?  Not absolutely necessary for this test but it is in your normal work. Smiley Happy

Okay - will do! Thank you! 


And yes, always shooting in RAW Smiley Happy 

Frequent Contributor
Posts: 26
Registered: ‎09-25-2016

Re: 70-200 2.8 - Focusing Issue

@Waddizzle wrote:

Thanks, for the clear and concise answers.  I agree with the others.  Zero out the AFMA settings.  Leave it cleared out.


Making those adjustments should be a last resort, not a first option.  It is easier to come up with a bad set of numbers than a good set.  It is a deceptively difficult task.  I am not saying it is hard, just that it is not easy to do.  It can test your skills just as much the gear.




You are also working with a very narrow Depth of Field, too.  

Okay, thank you! I will clear them out and see if I can get better results! 

powered by Lithium

LIKE US on Facebook FOLLOW US on Twitter WATCH US on YouTube CONNECT WITH US on Linkedin WATCH US on Vimeo FOLLOW US on Instagram SHOP CANON at the Canon Online Store
© Canon U.S.A., Inc.   |    Terms of Use   |    Privacy Statement