Originally posted by Marc Sabatella It would help to say which programs you've tried, and to post images demonstrating the image. but I'll hazard a guess - you are using the "D-range" feature on your camera, which third party RAW processing programs generally do not support. D-range works by deliberately underexposing the picture and then expecting the RAW processing to adjust the exposure tp look "right", and most third party RAW processing programs don't do that adjustment automatically. You could probably create your own custom curve to apply as a preset to try to mimic this effect.
Good catch I had forgotten about that -
this means the software used probably doesn't fully support all the Pentax K2000 features.
See post #
182 (link) where I illustrated a K-x DNG image that ACDsee Pro 3.0 386 (the latest version at the time) could not convert properly because I was using the Highlight Correction setting on my K-x and the software did not support the K-x properly - and Marc's kind and very helpful explanation to me about this.
However ACR (Adobe Camera RAW) 5.6 did, and converted the DNG fine and close to the paired JPG rendition - as obviously did the Pentax DCU software as supplied with my camera.
I seriously recommend trying out either of the two software to see if things are OK.