Originally posted by David&karen Hi everyone. I have a question about the current version of this lens: The OP says it is a screw drive focus lens, and it is shown to be so on B&H's website, but is described to be HSM focus and that is the picture of the lens on Adorama for the Pentax mount. Are there two versions of this lens floating around?
David
Hi, there is only one version, non-hsm screw-drive only (which is quite fast).
Before I brought this lens, I contacted SIGMA directly and asked this question and they confirmed it, I also asked if they plan on fitting it with HSM and they said "they have no plans fitting the Pentax version of this lens with HSM".