Originally posted by JinDesu It would be weird if there isn't compatibility with Pentax mount, as the new Sigma 35 F1.4 has a USB dock and is coming out for Pentax.
Yes, but this is Sigma, who sometimes remove the OS (or HSM long ago) from a lens for Pentax or Sony and charge the same amount! From what I've seen, the initial design for this system was a USB port in the side of the lens, but now it is a "dock" which is basically a USB lens mount with contacts for the Sigma data port. So, while it would be weird for Sigma not to make a Pentax version given that some compatible lenses will be PK, it is not unimaginable...