K100D and SDM/HSM lenses

[leto78]

I have a question about the compatibility between the K100D and the lenses with internal motor.
I know that the K100D doesn't have the necessary connectors to drive the lens motor but will the camara's motor be able to focus the lens?

I remember reading a long time ago that (some) pentax SDM lenses were compatible with K100D but I think this is not true for the sigma HSM lenses.

[blackcloudbrew]

The k100d will not drive SDM lenses. The k100ds (super) will. It has to do with the two extra contacts required for SDM. I can't speak to sigma's HSM system.

Tim

[Ozzi-Paul]

I have the Sigma 70-200 with HSM and there's no screw drive function, its HSM or manual. I would think the others are like this to.