Originally posted by neil I called Sigma about these lenses the other day. They told me they will not be coming out in the Pentax mount..."not enough demand".
He recommended emailing Sigma Japan to let them know I would want it in the Pentax mount. Maybe if enough of us request it, it can happen...
They used to make 105mm Macro for Pentax, but recently discontinued it and the new version of 105mm has no Pentax version.
So I assume they sold too few 105mm Pentax lenses.
The reason for this is that there are already 2 competitors for this lens - Pentax 100mm WR that everybody loves and Tamron 90mm which is pretty cheap and perhaps a little better than Sigma 105mm Macro was.
But if they made 150mm and 180mm macro for Pentax, those lenses would NOT have ANY competitors in Pentax mount. I bet they would have sold TONS of those lenses.
Someone needs to tell them that...