Why is the AF mode greyed out when using EF Sigma lenses on my C100?

[ahv_2022]

I have tried two EF Sigma lenses, the 18-300 and the 18-35 on my C100 and both show a greyed out AF Mode in the menu settings.  My apologies for the question, I know it's an old camera.

[IamintheUK]

Is this the mark 1 or mark 2 C100?

If a mark 1 and it doesn't have the DAF upgrade, then it wont have autofocus.

[ahv_2022]

Awesome, thank you!