I know that ... but why ... I use a digital camera to take a picture of an object about 5 inches from the camera. I use NO zoom. Then, after downloading the image to my PC, I right click on the file, and display its properties. Windows says it is 3264 pixels wide and 2448 pixels in height. It also says both the horizontal and vertical resolution is 180 DPI. I load the image into Microsort Paint, and it still says the image is 3264x2448. I change Paint to display image attributes in inches, and it is said to be 34" x 25.5". The actual object is roughly 6" by 4.5". What is that figure of 180 DPI ? How is that determined ? If the object is truly 6" wide, why isnt the DPI reported as ~544 ?