Why does AF-D for A99 only work on Sony Lenses?

Started Oct 26, 2012 | Discussions thread
Archer66
Senior MemberPosts: 2,295
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Re: Why does AF-D for A99 only work on Sony Lenses?
In reply to sybersitizen, Oct 26, 2012

sybersitizen wrote:

In order for this feature to work, the camera must refer to its internal database for detailed information about each compatible lens. When a lens is attached, it provides an ID and other data to the camera. If the lens ID is in the camera's database, the AF-D feature will work with it... otherwise it won't. Sony says they will continue to update the camera's database in the future. If at some point a third-party lens can successfully masquerade as a supported Sony lens, then AF-D might work with it... otherwise it won't.

Wonder what will happen with Sigma lenses.

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