Pentax K10D Pros:

• Compatible with an extensive list of Pentax K lenses
• Responsive with a good shutter lag time, very good shot-to-shot speed
• Good color accuracy
• Easy white balance adjustment
• Bright, powerful built-in flash
• Good quality in kit lens
• Fairly quick Continuous Shooting mode
• RAW button for quickly entering RAW mode
• Two RAW modes for greater compatibility
• Green button for bringing settings back to average
• Body sealed against moisture
• Digital depth-of-field preview mode
• Extended bracket mode for bracketing White balance, Saturation, Sharpness, and Contrast
• Use of SDHC cards for greater capacity
• Special setting locks out bad aperture settings for certain lenses
• In-camera Shake Reduction among the best we’ve seen
• Very good low-light shooting capabilities
• Image noise is impressively low all the way up 1,600
• Printed results are very impressive, producing decent 11×14 inch images up to ISO 1,600!
• Enjoyable to use

Pentax K10D Cons:

• Very warm color balance in low-lighting and warm outdoors
• Auto white balance had a hard time with household incandescent lighting
• Shadow detail lacking in JPEG images
• Slightly high contrast, especially outdoors in full sun
• Phantom pixels with contrasty horizontal lines
• Slow AF indoors

Website : Pentax K10D Pros and Cons from Imaging Resource