Ok, I took two shots yesterday pushing the ISO up to 1600 to compare my K10. I am so impressed with the high ISO capability of this camera, so far. I know it will open alot of wildlife shots up for me that were not there with the K10 as iwill feel very comfortable shooting at 1000-1200 ISO if needed for shutter speeds. I was warned this is a big jump up with the K20 sensor. Well, you were all right and I only wish I would have jumped in months ago, though the K10 has served my well as it will my daughter now. Cheers JIM