Sigma has put back the sale of its SD14 digital SLR until March blaming an ?unexpected hardware problem? that arose prior to production.

Originally due on sale in November the ?14-million-pixel? model uses a X3 Foveon sensor and was expected to cost around £1,100 (see AP’s issue dated 7 October).

In a letter to its customers Sigma Corporation?s chief operating officer Kazuto Yamaki explained that Sigma had ?found one issue that occurred occasionally and only under certain circumstances?.

He added: ?Initially, we felt that this could be solved with a programming or processing solution. However, after careful investigation and many attempts at a solution, we have come to the conclusion that we need to make a hardware change to fix this issue completely.?

Yamaki said that retail sales are due to start in ?mid-March?.

Showcased at the recent Photokina show in Germany features on board the Sigma SA bayonet-mount model include JPEG recording format as well as raw.

A UK spokesperson confirmed that the camera is now expected to be launched at the end of February or early March while a ?design change? is made.

To see the full contents of Yamaki?s letter visit

We will bring you more details when we can.