What is the difference between 300DPI and 600DPI

300dpi is good for sharing photos with family and friends. It also takes up less space and is easier to share cause the file size is smaller. If you scan a 4×6 at 300dpi you can make a enlargement no bigger than a 5×7.

600dpi you get more resolution, so the image will not pixelate if you make a 4×6 into as large as a 11×14. Also smaller images like a 2.5×3.5 will benefit from the higher resolution scan when you view them on a high resolution screen like a 4K tv.