The Pentax 645D firmware update v1.02 makes four changes to the camera's operation. For cameras running 645D v1.02, the camera's LCD panel will now display the time remaining to complete a dark current exposure after the image exposure has completed, when long exposure noise reduction is active. It will also allow the flash sync speed to be manually configured when the Mode dial is set to the X position. In addition, the Pentax 645D running v1.02 will extend standby time up to five minutes when mirror lockup is in use, unless the Auto Power Off setting is configured to take effect in a shorter duration, in which case that lower time limit will apply. Finally, the medium format DSLR is now set to show as "645D" rather than "Removable Disk" when attached to a PC via USB, and will set the volume label of formatted SD cards to 645D. This firmware also rolls in the SDXC card support introduced in the previous v1.01 firmware. More details are on the Pentax 645D firmware download page.

The Pentax K-5 firmware update v1.03, meanwhile, aims to address user concerns about inaccurate auto focus in low ambient lighting conditions. In addition, overall stability is said to have been improved, although no specifics are provided. Pentax K-5 v1.03 also includes the SDXC card support and greatly increased Raw burst shooting depth of previous firmware releases, as well as the various other fixes made in these. More details can be found on the Pentax K-5 firmware download page.

UPDATED 2011-03-10 17:10ET: These firmware updates are now also available from the Downloads & Literature section of the Pentax USA website.