Cosina produces ZK Planar T* for Pentax.

Cosina announced they will launch the sale of ZK Planar lenses for Pentax KA mount. Planar T* 1.4/50 ZK & Planar T* 1.4/85 ZK, in this summer.

via: デジカメWatch(jp)

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However, I doubt their qualities. They say the lenses fit both film cameras and those of digital, but if it suits digital, would they need certain different technology from that of old Carl Zeiss lenses? They may be brandishing with the name, or are new comers just great in other points? Nmm... indeed, I don't have a Pentax.