Pentax has announced firmware updates for 3 of its DSLR cameras - the K-S1 and K-S2 and K-3
Details of the updates for each camera are listed below:

PENTAX K-S1 FIRMWARE VERSION 1.10
  • Optimized performance of HD PENTAX-DA 18-50mm f/4-5.6 DC WR RE, HD PENTAX-D FA 150-450mm f/4.5-5.6ED DC AW and HD PENTAX-D FA* 70-200mm f/2.8ED DC AW.
  • Corresponded to AF button and preset button function for HD PENTAX-D FA 150-450mm f/4.5-5.6ED DC AW.
  • Improved stability for general performance.

To find out more and/or download the K-S1 updates click here.

Pentax K-S2 firmware version 1.01
  • Optimized performance of HD PENTAX-D FA 150-450mm f/4.5-5.6ED DC AW and HD PENTAX-D FA* 70-200mm f/2.8ED DC AW.
  • Improved stability for general performance.

To find out more and/or download the K-S2 updates click here.

PENTAX K-3 FIRMWARE VERSION 1.20
  • Optimized performance of HD PENTAX-DA 18-50mm f/4-5.6 DC WR RE, HD PENTAX-D FA 150-450mm f/4.5-5.6ED DC AW and HD PENTAX-D FA*70-200mm f/2.8 ED DC AW.
  • Corresponded to AF button and preset button function for HD PENTAX-D FA 150-450mm f/4.5-5.6ED DC AW.
  • Improved stability for general performance.

To find out more and/or download the K-3 updates click here.