Thank you for purchasing and using our products.

We have found that some SIGMA interchangeable lenses for Pentax mount could leave a small scratch on part of the camera body when they are attached to the PENTAX K-70, released by RICOH IMAGING COMPANY, LTD. on July 22nd, 2016. In this circumstance, please do not use the following lenses for Pentax mount on the PENTAX K-70. 
We are planning to provide a repair service to replace the part of the lens relating to this issue, just as we announced for the PENTAX K-1 on May 27th, 2016. We will make a further announcement on our website when specific details are finalized. 

Phenomenon
When some SIGMA interchangeable lenses for Pentax mount are attached to the PENTAX K-70, the upper part of the mount can be scratched.

Applicable products
Lenses that have been repaired for Pentax K-1 do not need another repair to be used on Pentax K-70.
【Current Line-Up】
  • SIGMA 30mm F1.4 DC HSM | Art
  • SIGMA 35mm F1.4 DG HSM | Art
  • SIGMA APO 50-500mm F4.5-6.3 DG OS HSM

【Discontinued Lenses】
  • SIGMA 50mm F1.4 EX DG HSM
  • SIGMA 85mm F1.4 EX DG HSM
  • SIGMA 24-70mm F2.8 IF EX DG HSM
  • SIGMA APO 70-200mm F2.8 EX DG OS HSM
  • SIGMA APO 70-200mm F2.8 II EX DG MACRO HSM
  • SIGMA APO 50-150mm F2.8 II EX DC HSM
  • SIGMA APO 120-400mm F4.5-5.6 DG OS HSM*
  • SIGMA APO 150-500mm F5-6.3 DG OS HSM*
* Applicable to the models without OS function too.

For further information, please contact your nearest authorized SIGMA subsidiary / distributor. 
http://www.sigma-photo.co.jp/english/network/index.html