Phase Detect doesn't work with E Mount Lenses on a7

Started Dec 13, 2013 | Discussions thread
GXRuser
Contributing MemberPosts: 656
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Re: Phase Detect doesn't work with E Mount Lenses on a7
In reply to sabad, Dec 13, 2013

sabad wrote:

I just tried my Sigma 60mm F/2.8 DN but I can't enable Phase Detect it says Phase Detect is invalid with this lens. This is disappointing as Phase Detect does help with focusing quicker. I just compared phase detect on my Kit Lens on the a7 and it is focuses faster when enabled.

Why is it invalid?

Phase Detection AF has never been supported with the Sigma E Mount lenses on the NEX-6, 5R or 5T.

There is no reason to expect it to be enabled with the A7 or A7R.

The Sony E-Mount lenses that support phase detection AF all had Firmware upgrades to enable support or had phase detection support in firmware when released. This includes the Zeiss 24mm f1.8.

Of note, the Sony E-Mount 16mm does not support phase detection AF.

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