Originally posted by pete-tarmigan I don't think that model of camera is compatible with high capacity SD cards, nor is there a firmware update to accomodate that kind of card. If I'm not mistaken, firmware fixes to use SDHC cards only go as far back as the K10D.
You're mistaken. The DS and DL have firmware updates for SDHC cards. From this page:
Downloads & Literature - PENTAX Imaging USA
they say this about firmware:
PENTAX *istDL FIRMWARE UPDATE VERSION 1.03
VERSION HISTORY
Version 1.03 :
•Improved support for SDHC memory cards.
The update should be done from a 2Gb or smaller card which already works with the camera, following the instructions on the Pentax site. Then the camera can use the larger cards. The SDXC cards are incompatible.