DotTune Autofocus micro adjustment for Canon DSLR Cameras

I found another simple method making a autofocus micro-adjustment for Canon DSLR Cameras and lenses on the Web, which brings very good results.  My comparison tests have led to the same results as with live view methodic. Benefit from DotTune, you need no computer or extra software view and it is also free of charge. 

DotTune there also now as automatic AFMA - automatic auto-focus micro adjustment tool in the free open source software Magic Lantern for some Canon DSLR cameras, e.g. 5d2, 5d3, 6d, 7d


To set expiration and structure:

The recommended shooting distance to the test chart or any AF target is 50 x focal length/mm.
Example: lens focal length 300 mm is equivalent to 15 meters distance to the target.

 

DotTune expiration:

 

1.    Build camera with lens on a tripod

2.    Select camera setting - one shot and medium AF field.

3.    Set aperture for Aperture Lens, AF select on the lens (Canon).

4.    With live view the selected test chart or focus target focus confirmation green frame + beep sound.

5.    Switch on the lens to MF - switch to manual focus.

6.    C.Fn open and set AF micro adjustments to “0”.

7.    Shutter button press halfway and check whether the AF indicator remains permanently lit.

8.    AF adjustment in + direction each one point adjust, press trigger again halfway and so often repeat

      the whole thing until the AF indicator no longer instantly lights up

9.     Note the determined AF + set value.

10.  AF adjustment set back to "0" and then in - direction each one point adjust, press trigger again

       halfway and so often repeat the whole thing until the AF indicator no longer instantly lights up.

11.  Now open the AF adjustment range and mean value of - adjustment to the + setting to determine and

       adjust the calculated value as the AF fine adjustment value.

12.  Example: 6 to + 14 is 20 points, the average is 10 units. Now I go with the dial from-6 to 10 units

       in the + direction and come on my AF adjustment value of + 4 finished.

13.  If the AF indicator in the viewfinder already at fine adjustment "0" flickers or is not visible it should

       begin by + 20 or -20 to find the AF area where the AF permanently lit indicator in the viewfinder.

14.  AF beyond counter constantly the + 20 or -20 range, one should try method and Canon utilities with

       live view to run the AF Microjustage in the outer areas of the setting.

 

One is surprised how big the preset auto focus area in the camera is actually!

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DotTune auto-focus micro adjustment for Canon DSLR Cameras
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