Originally posted by RonHendriks1966 This is NOT true. Just got an answer from Sigma USA since I'm struggling with this question:
Dear Sir/Madam,
Thank you for your e-mail and inquiry.
1) There is no information about Pentax AF mount for the new 120-300mm f2.8 EX DG OS HSM lens at this point.
2) Also there is no information for new 300mm f2.8 lens.
Sincerely,
Customer Service
SIGMA Corporation of America
Actually yes, it
IS true !
Sigma announces new lenses for Pentax
120-300mm/2.8, 150mm F2.8, 12-24mm, 105mm macro
In a press release today, Sigma announced that it is upgrading its existing 120-300mm F2.8 and Macro 150mm F2.8 lenses with the latest OS and HSM technologies. In addition, these lenses will become weather-sealed and will finally be made available in the Pentax mount. Furthermore, a new weather-sealed 12-24mm wide-angle zoom was announced. These lenses will be launched in April, and we expect to see their K-mount variants to surface in May.
In the press release, Sigma also revealed plans of updating its 50-150mm F2.8 and Macro 105mm F2.8 lenses with the latest technologies.
https://www.pentaxforums.com/index.php