FTZ adapter firmware update broke autofocus on 18-35mm D?

Started 4 months ago | Questions thread
BasilG Veteran Member • Posts: 9,421
Re: AF-D

I like Lenses wrote:

Since the AF-D discussion has started again, here is a useful resource:


  • AF - Auto focus (1986)
  • Lens focused by motor in camera, 5 CPU contacts on lens mount.
  • D lens (1992) - Transmits focus Distance for improved flash metering.
  • AF-I (1992) - Telephoto with Integrated AF motor, 10 CPU contacts, manual override of AF.
  • AF-S (1996) - Similar to AF-I with improved Silent Wave motor.

The point here is that D lenses can also be AF-I or AF-S lenses, with internal motors.

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