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I'm not currently near my camera to do any testing, but when the module runs to +/-100 with a confirmation at each point, that likely means that the module is not actually managing to change the AFMA setting.  The most likely reason is that you are adjusting the AFMA by lens, but the particular lens is not yet registered with the camera.  All you should need to do is to use the Canon menu to first manually specify an AFMA setting, any setting, and then the lens will be registered.  After that, the module should work.

Alternatively, you can switch the AFMA mode to all lenses, and then the registration step isn't necessary.

Finally, I would encourage anyone who has difficulties with the module to make clear whether or not he/she can successfully use the DotTune approach in the manual fashion (i.e., not using the module).  That will help distinguish between issues with the module and issues with the setup.

Yes! Thank you, this solved my issue. To clarify for anybody else, I went into the canon menu, accessed the AFMA settings and made sure to click 'Register' when dealing with a specific lens. I changed the value to -1, set it, then went back in and changed it to zero again, just to make sure it saved a value of some sort specifically for the lens. Ran the module and it no longer gave me the +/-100 issue. Thanks for helping ayshih.

Just did this test today with the current bleeding edge build (April 10th, 2PM)

Shot on the 5D Mark 3, with the 85mm 1.2 L Canon.

ISO 100, F1.8, Shutter at 1/200, using a printable focus chart about 1 meter away from the camera.

I ran the module after focusing manually with live view at 10x magnification, and it just runs to the +/-100 with a confirmation at each point. Is that because of the distance? Aperture? I use the flaat_10 picture style if that makes any difference in how the camera meters/focuses. New to the micro adjustment game, just figured I'd throw some information out to see if it's a user error or whatever. Thanks for the help!

Also, planning on doing this with the 35mm 1.4, 50mm 1.4, 16-35mm2.8, and 70-200mm 2.8 (all canon) and was curious if anybody has had positive result for any of those lenses.

Also for the record, the chart in question is here: http://www.testcams.com/DotTune/CrossHatch_Target.png

If I don't have luck with the 85mm, I'll try to other primes and see what I get.

Just did this test today with the current bleeding edge build (April 10th, 2PM)

Shot on the 5D Mark 3, with the 85mm 1.2 L Canon.

ISO 100, F1.8, Shutter at 1/200, using a printable focus chart about 1 meter away from the camera.

I ran the module after focusing manually with live view at 10x magnification, and it just runs to the +/-100 with a confirmation at each point. Is that because of the distance? Aperture? I use the flaat_10 picture style if that makes any difference in how the camera meters/focuses. New to the micro adjustment game, just figured I'd throw some information out to see if it's a user error or whatever. Thanks for the help!

Also, planning on doing this with the 35mm 1.4, 50mm 1.4, 16-35mm2.8, and 70-200mm 2.8 (all canon) and was curious if anybody has had positive result for any of those lenses.