I am just a beginner so not sure if I do something wrong or my camera is faulty. Almost every picture I take with my new Samsung NX3000 looks like it got bad random noise on darker colors. For example in this picture (ISO-400, time-1/320). Original image is resized due to size limit, but you can see zoomed fragment from this picture. My old cheap Fuji s5800 makes better pictures in daylight. Could someone explain if it's me or my camera? Thanks.