Update on the scratch issue caused by attaching Sigma lenses on Pentax K-1 camera body

Sigma lenses leave scratch on the Pentax K-1 camera body
Sigma issued an update on the issue where their lenses are causing a scratch on the Pentax K-1 camera body:

(Update) Use of Pentax mount SIGMA interchangeable lenses when attached to the “Pentax K-1”

Thank you for purchasing and using our products.

We would like to inform you of our policy on the repair service that we announced on May 11th,
regarding the use of Pentax mount SIGMA interchangeable lenses when attached to the “Pentax K-1”.

For customers using our interchangeable lenses with aforementioned camera body,
we apologize for the inconvenience.
Please find the following details for the phenomenon and products;

When some SIGMA interchangeable lenses for Pentax mount are attached to the PENTAX K-1,
the upper part of the mount can be scratched.
※This phenomenon is due to the interference with the shape of the upper part of the mount on the PENTAX K-1
camera body and it does not occur to any cameras other than PENTAX K-1.

・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 24-70mm F2.8 IF EX DG HSM
SIGMA APO 70-200mm F2.8 EX DG OS 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*
* it is applicable to the models without OS function, too.

For details of this repair service, please contact your nearest authorized subsidiary/distributor of Sigma.

In case of scratch on the PENTAX K-1 camera body
In case your PENTAX K-1 camera body has got a scratch from attaching aforementioned lenses,
we are planning to repair the damaged part of camera body, too.
The detail of repair will be announced later, and we would probably ask customers to send the camera body and lens to us.

* Once we receive the camera body, we would ask RICOH IMAGING or its authorized repair stores to repair it.

We will inform the lead time for repair, and return the body and lens as quick as possible.


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  • HD10

    To me, this seems like a minor cosmetic scratch but its encouraging to see Sigma take such proactive steps to address the issue. This is perhaps even more surprising considering that Pentax has used Tamron-based lenses for Pentax. Kudos to Sigma.

    • TinusVerdino

      What has that got to do with it. Sigma isn’t making any first party branded lenses. Tamron have done that all along.

      • HD10

        Do you have anything against what Sigma has initiated?

        • TinusVerdino

          You seem to think Sigma doesn’t have to resolve this because Pentax sells rebranded Tamron lenses. Pentax would probably also like to rebrand certain Sigma lenses, but Sigma won’t do that.

          • Kunzite

            Pentax rebranding Sigma lenses… that can’t happen unless said Sigma lenses are 100% K-mount compliant.

          • HD10

            “You seem to think Sigma doesn’t have to resolve this because Pentax sells rebranded Tamron lenses.”
            Not at all. Where did that come from? I was simply praising Sigma and that is all there is to that.

  • Duncan Dimanche

    pentax should be the one addressing this issue… seriously ! No other brand has had this issue with sigma lenses…

    • Kunzite

      Addressing… how, exactly? By paying Sigma to replace their non-standard mounts with more reasonably sized ones?
      Perhaps Pentax should pay 3rd-party makers to better reverse engineer Pentax communication protocols, too.

    • HD10

      I understand where you are coming from but Pentax do also have the right to make its products as it sees fit. Overall, I consider Sigma’s effort as proactive and praiseworthy.

    • sickheadache

      The Big Red Arrow is larger than the lil bitty little bitty lil bitty little smidgen faint scratch…duncan hines..relax gurl…it is a big…nothing…

    • TinusVerdino

      Sigma should sue Ricoh for not providing a decent camera for their lenses :p

  • sickheadache

    Duncan…I fixed the scratch…

  • TheInconvenientRuth

    Now I don’t own a K-1 *yet) but I’m 99.99% positive that somewhere in the fine print in the user manual, it says something like: “Use of third party lenses and accesories may cause damage to your Pentax camera and this damage is not covered under warranty” or words to that effect…

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