Why won't autofocus work w/ a lens listed as "Through Focus"?

[Flynn]

If you don't have to focus the adapter, shouldn't the lenses listed as through focus work with autofocus?

https://docs.google.com/spreadsheets/d/13WruS37PBu9MH3RI-AsNClNsaLoS49IvRlLKx0uVuD4/htmlview

[funkyou86]

  On 2/20/2017 at 7:22 PM, Flynn said:

If you don't have to focus the adapter, shouldn't the lenses listed as through focus work with autofocus?

https://docs.google.com/spreadsheets/d/13WruS37PBu9MH3RI-AsNClNsaLoS49IvRlLKx0uVuD4/htmlview

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What lens do you have in mind? 

I had a Moller 19/1.5x and the AF worked flawlessly on the 70D.

[Flynn]

Thanks. I was just thinking any lens listed as "Through Focus" on Tito's chart, autofocus should work. But then I figured there must be a reason it doesn't work, cause people are always saying you can't use autofocus with an adapter.

[funkyou86]

  On 2/20/2017 at 8:26 PM, Flynn said:

Thanks. I was just thinking any lens listed as "Through Focus" on Tito's chart, autofocus should work. But then I figured there must be a reason it doesn't work, cause people are always saying you can't use autofocus with an adapter.

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I believe it depends on the af system mostly. The A6500 and the canons dual pixel af can do a pretty good job nowdays, so if it worked with the Moller, we should ask our fellow forumers to test out the foucus through lens.