Pentax has released new firmware to its K-x and K-7 dSLR cameras. The firmware updates, v1.02 for the K-x, and v1.11 for the K-7, add support for SDXC (secure digital extended capacity) memory cards, which are currently available up to 64GB capacity, with 128GB cards to be available very soon. While these firmware updates allow K-x and K-7 to use SDXC memory cards, Pentax notes they are not compatible with the new UHS speed class found on some new SDHC and SDXC memory cards.
We generally recommend installing the latest firmware updates for your camera, so you can get the most out of your gear. For more information on firmware updates for a specific camera, visit the manufacturer's Web site. Before installing any firmware upgrade, always take the time to read through all of the documentation and follow the manufacturer's instructions carefully.