Purpose: Instructions for scanning black and white or color photographs for preservation-quality scans and images to upload to Special Collections Digital Commons. Scanning Preservation File Image Size bmp jpg pdf 3.5x 5 inches 800 dpi 300 dpi 400 dpi 5×7 inches 600 dpi 300 dpi 400 dpi 8×10 inches 400 dpi 300 dpi 400 dpi