Sigma Announces Lens Mounting Issue with K-70
Minor scratch to the camera body possible
By PF Staff in Third-Party Announcements on Aug 9, 2016
Sigma Japan has posted a product advisory warning customers that when select Sigma lenses are attached to the Pentax K-70, a minor scratch to the camera's lens mount may be inflicted. This notice applies to the following lenses:
- Sigma 24-70mm F2.8 IF EX DG HSM
- Sigma 30mm F1.4 DC HSM (Art)
- Sigma 35mm F1.4 DG HSM (Art)
- Sigma 50mm F1.4 EX DG HSM
- Sigma 50-150mm F2.8 EX DC APO HSM II
- Sigma 50-500mm F4.5-6.3 DG OS HSM
- Sigma 70-200mm F2.8 EX DG APO Macro HSM II
- Sigma 70-200mm F2.8 EX DG OS HSM
- Sigma 85mm F1.4 EX DG HSM
- Sigma 120-400mm F4.5-5.6 DG APO OS HSM
- Sigma 150-500mm F5-6.3 APO DG OS HSM
Sigma advises customers to send in the affected lenses for free repairs at an authorized Sigma service center. Sigma will also soon offer to repair affected K-70 bodies at no charge.
This same notice was issued for the Pentax K-1, along with a corresponding repair service.
Many Sigma lens mounts have flanges with a larger outer diameter than genuine K-mount lenses. Since this flange can extend beyond the mount on the camera, it can come into contact with the camera body and cause a scratch, even after a single mounting.
This issue currently only affects the K-1 and K-70. To address the problem, Sigma is replacing the flanges with ones that won't come into contact with the camera body.
An example of the resulting scratch is shown below:
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